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1909401600000 = 21435531401
BaseRepresentation
bin11011110010010001001…
…101000100000000000000
320202112111110222021100210
4123302101031010000000
5222240423302200000
64021100022514120
7254643515545056
oct33622115040000
96675443867323
101909401600000
11676855474a44
1226a07a895940
1310b09578686b
14685b63041d6
1534a0434c350
hex1bc91344000

1909401600000 has 720 divisors, whose sum is σ = 6585745485312. Its totient is φ = 491520000000.

The previous prime is 1909401599993. The next prime is 1909401600019. The reversal of 1909401600000 is 61049091.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4761599800 + ... + 4761600200.

Almost surely, 21909401600000 is an apocalyptic number.

1909401600000 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 1909401600000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3292872742656).

1909401600000 is an abundant number, since it is smaller than the sum of its proper divisors (4676343885312).

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

1909401600000 is an frugal number, since it uses more digits than its factorization.

1909401600000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 488 (or 442 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 30.

Adding to 1909401600000 its reverse (61049091), we get a palindrome (1909462649091).

The spelling of 1909401600000 in words is "one trillion, nine hundred nine billion, four hundred one million, six hundred thousand".