12013502556 has 24 divisors (see below), whose sum is σ = 30579825024. Its totient is φ = 3640455280.

The previous prime is 12013502507. The next prime is 12013502563. The reversal of 12013502556 is 65520531021.

It is a happy number.

It is a congruent number.

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, 45505560 + ... + 45505823.

It is an arithmetic number, because the mean of its divisors is an integer number (1274159376).

Almost surely, 2^12013502556 is an apocalyptic number.

It is an amenable number.

12013502556 is an abundant number, since it is smaller than the sum of its proper divisors (18566322468).

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

12013502556 is a wasteful number, since it uses less digits than its factorization.

12013502556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91011401 (or 91011399 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 30.

The spelling of 12013502556 in words is "twelve billion, thirteen million, five hundred two thousand, five hundred fifty-six".