15557542475 has 24 divisors (see below), whose sum is σ = 20340960000. Its totient is φ = 11771079840.

The previous prime is 15557542463. The next prime is 15557542501. The reversal of 15557542475 is 57424575551.

It is not a de Polignac number, because 15557542475 - 2¹⁰ = 15557541451 is a prime.

It is a super-2 number, since 2×15557542475² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 257186 + ... + 311864.

It is an arithmetic number, because the mean of its divisors is an integer number (847540000).

Almost surely, 2^15557542475 is an apocalyptic number.

15557542475 is a deficient number, since it is larger than the sum of its proper divisors (4783417525).

15557542475 is a wasteful number, since it uses less digits than its factorization.

15557542475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55307 (or 55302 counting only the distinct ones).

The product of its digits is 4900000, while the sum is 50.

The spelling of 15557542475 in words is "fifteen billion, five hundred fifty-seven million, five hundred forty-two thousand, four hundred seventy-five".