15557004550 has 24 divisors (see below), whose sum is σ = 28939833000. Its totient is φ = 6221983680.

The previous prime is 15557004527. The next prime is 15557004563. The reversal of 15557004550 is 5540075551.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 489546 + ... + 520354.

It is an arithmetic number, because the mean of its divisors is an integer number (1205826375).

Almost surely, 2^15557004550 is an apocalyptic number.

15557004550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

15557004550 is a deficient number, since it is larger than the sum of its proper divisors (13382828450).

15557004550 is a wasteful number, since it uses less digits than its factorization.

15557004550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40920 (or 40915 counting only the distinct ones).

The product of its (nonzero) digits is 87500, while the sum is 37.

The spelling of 15557004550 in words is "fifteen billion, five hundred fifty-seven million, four thousand, five hundred fifty".