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11111000000 = 265641271
BaseRepresentation
bin10100101100100010…
…00110011111000000
31001200100022021121112
422112101012133000
5140223404000000
65034311142452
7542224641002
oct122621063700
931610267545
1011111000000
114791962831
1221a1074a28
131080c1cc19
14775926372
154506b8235
hex2964467c0

11111000000 has 196 divisors, whose sum is σ = 28336512288. Its totient is φ = 4320000000.

The previous prime is 11110999981. The next prime is 11111000009. The reversal of 11111000000 is 11111.

It is a Harshad number since it is a multiple of its sum of digits (5).

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111000009) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 40999865 + ... + 41000135.

Almost surely, 211111000000 is an apocalyptic number.

11111000000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11111000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14168256144).

11111000000 is an abundant number, since it is smaller than the sum of its proper divisors (17225512288).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11111000000 is an frugal number, since it uses more digits than its factorization.

11111000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354 (or 319 counting only the distinct ones).

The product of its (nonzero) digits is 1, while the sum is 5.

Adding to 11111000000 its reverse (11111), we get a palindrome (11111011111).

Multiplying 11111000000 by its reverse (11111), we get a square (123454321000000 = 111110002).

11111000000 divided by its reverse (11111) gives a 6-th power (1000000 = 106).

The spelling of 11111000000 in words is "eleven billion, one hundred eleven million", and thus it is an aban number.