13557921912 has 80 divisors (see below), whose sum is σ = 37992117240. Its totient is φ = 4517239104.

The previous prime is 13557921851. The next prime is 13557921919. The reversal of 13557921912 is 21912975531.

13557921912 is a `hidden beast` number, since 1 + 3 + 557 + 9 + 2 + 1 + 91 + 2 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13557921919) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2182603 + ... + 2188805.

Almost surely, 2^13557921912 is an apocalyptic number.

13557921912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13557921912 is an abundant number, since it is smaller than the sum of its proper divisors (24434195328).

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

13557921912 is a wasteful number, since it uses less digits than its factorization.

13557921912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9594 (or 9581 counting only the distinct ones).

The product of its digits is 170100, while the sum is 45.

The spelling of 13557921912 in words is "thirteen billion, five hundred fifty-seven million, nine hundred twenty-one thousand, nine hundred twelve".