15525140520 has 64 divisors (see below), whose sum is σ = 49315158720. Its totient is φ = 3896505344.

The previous prime is 15525140447. The next prime is 15525140567. The reversal of 15525140520 is 2504152551.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 3803142 + ... + 3807221.

It is an arithmetic number, because the mean of its divisors is an integer number (770549355).

Almost surely, 2^15525140520 is an apocalyptic number.

15525140520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15525140520 is an abundant number, since it is smaller than the sum of its proper divisors (33790018200).

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

15525140520 is a wasteful number, since it uses less digits than its factorization.

15525140520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7610394 (or 7610390 counting only the distinct ones).

The product of its (nonzero) digits is 10000, while the sum is 30.

The spelling of 15525140520 in words is "fifteen billion, five hundred twenty-five million, one hundred forty thousand, five hundred twenty".