10999989000 has 1536 divisors, whose sum is σ = 52982092800. Its totient is φ = 2052864000.

The previous prime is 10999988999. The next prime is 10999989001. The reversal of 10999989000 is 98999901.

It is an interprime number because it is at equal distance from previous prime (10999988999) and next prime (10999989001).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10999989001) by changing a digit.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 297296982 + ... + 297297018.

It is an arithmetic number, because the mean of its divisors is an integer number (34493550).

Almost surely, 2^10999989000 is an apocalyptic number.

10999989000 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 10999989000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26491046400).

10999989000 is an abundant number, since it is smaller than the sum of its proper divisors (41982103800).

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

10999989000 is a wasteful number, since it uses less digits than its factorization.

10999989000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109 (or 78 counting only the distinct ones).

The product of its (nonzero) digits is 472392, while the sum is 54.

It can be divided in two parts, 10999 and 989000, that added together give a palindrome (999999).

The spelling of 10999989000 in words is "ten billion, nine hundred ninety-nine million, nine hundred eighty-nine thousand".