15555565164 has 24 divisors (see below), whose sum is σ = 38206651840. Its totient is φ = 4912283664.

The previous prime is 15555565153. The next prime is 15555565219. The reversal of 15555565164 is 46156555551.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34112854 + ... + 34113309.

Almost surely, 2^15555565164 is an apocalyptic number.

It is an amenable number.

15555565164 is an abundant number, since it is smaller than the sum of its proper divisors (22651086676).

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

15555565164 is a wasteful number, since it uses less digits than its factorization.

15555565164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68226189 (or 68226187 counting only the distinct ones).

The product of its digits is 2250000, while the sum is 48.

The spelling of 15555565164 in words is "fifteen billion, five hundred fifty-five million, five hundred sixty-five thousand, one hundred sixty-four".