15557442612 has 48 divisors (see below), whose sum is σ = 37467064320. Its totient is φ = 5021815392.

The previous prime is 15557442557. The next prime is 15557442629. The reversal of 15557442612 is 21624475551.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 116548 + ... + 211419.

It is an arithmetic number, because the mean of its divisors is an integer number (780563840).

Almost surely, 2^15557442612 is an apocalyptic number.

15557442612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

15557442612 is an abundant number, since it is smaller than the sum of its proper divisors (21909621708).

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

15557442612 is a wasteful number, since it uses less digits than its factorization.

15557442612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328100 (or 328098 counting only the distinct ones).

The product of its digits is 336000, while the sum is 42.

The spelling of 15557442612 in words is "fifteen billion, five hundred fifty-seven million, four hundred forty-two thousand, six hundred twelve".