15557143980 has 96 divisors (see below), whose sum is σ = 49803393024. Its totient is φ = 3554452224.

The previous prime is 15557143951. The next prime is 15557143991. The reversal of 15557143980 is 8934175551.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1263534 + ... + 1275786.

It is an arithmetic number, because the mean of its divisors is an integer number (518785344).

Almost surely, 2^15557143980 is an apocalyptic number.

15557143980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15557143980 is an abundant number, since it is smaller than the sum of its proper divisors (34246249044).

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

15557143980 is a wasteful number, since it uses less digits than its factorization.

15557143980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15295 (or 15293 counting only the distinct ones).

The product of its (nonzero) digits is 756000, while the sum is 48.

The spelling of 15557143980 in words is "fifteen billion, five hundred fifty-seven million, one hundred forty-three thousand, nine hundred eighty".