12561575528 has 16 divisors (see below), whose sum is σ = 23557632000. Its totient is φ = 6279540336.

The previous prime is 12561575513. The next prime is 12561575539. The reversal of 12561575528 is 82557516521.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112418 + ... + 194321.

It is an arithmetic number, because the mean of its divisors is an integer number (1472352000).

Almost surely, 2^12561575528 is an apocalyptic number.

It is an amenable number.

12561575528 is a deficient number, since it is larger than the sum of its proper divisors (10996056472).

12561575528 is a wasteful number, since it uses less digits than its factorization.

12561575528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311864 (or 311860 counting only the distinct ones).

The product of its digits is 840000, while the sum is 47.

The spelling of 12561575528 in words is "twelve billion, five hundred sixty-one million, five hundred seventy-five thousand, five hundred twenty-eight".