15565652250 has 32 divisors (see below), whose sum is σ = 38851869888. Its totient is φ = 4150840400.

The previous prime is 15565652243. The next prime is 15565652279. The reversal of 15565652250 is 5225656551.

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, 10376352 + ... + 10377851.

It is an arithmetic number, because the mean of its divisors is an integer number (1214120934).

Almost surely, 2^15565652250 is an apocalyptic number.

15565652250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

15565652250 is an abundant number, since it is smaller than the sum of its proper divisors (23286217638).

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

15565652250 is a wasteful number, since it uses less digits than its factorization.

15565652250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20754223 (or 20754213 counting only the distinct ones).

The product of its (nonzero) digits is 450000, while the sum is 42.

The spelling of 15565652250 in words is "fifteen billion, five hundred sixty-five million, six hundred fifty-two thousand, two hundred fifty".