12556735552 has 28 divisors (see below), whose sum is σ = 26000634816. Its totient is φ = 6005394560.

The previous prime is 12556735537. The next prime is 12556735579. The reversal of 12556735552 is 25553765521.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4263724 + ... + 4266667.

Almost surely, 2^12556735552 is an apocalyptic number.

It is an amenable number.

12556735552 is an abundant number, since it is smaller than the sum of its proper divisors (13443899264).

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

12556735552 is an equidigital number, since it uses as much as digits as its factorization.

12556735552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8530426 (or 8530416 counting only the distinct ones).

The product of its digits is 1575000, while the sum is 46.

The spelling of 12556735552 in words is "twelve billion, five hundred fifty-six million, seven hundred thirty-five thousand, five hundred fifty-two".