12521042568 has 48 divisors (see below), whose sum is σ = 33937476300. Its totient is φ = 4170441600.

The previous prime is 12521042551. The next prime is 12521042647. The reversal of 12521042568 is 86524012521.

12521042568 is a `hidden beast` number, since 1 + 2 + 52 + 1 + 0 + 42 + 568 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 6675216804 + 5845825764 = 81702^2 + 76458^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26838 + ... + 160506.

Almost surely, 2^12521042568 is an apocalyptic number.

12521042568 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

12521042568 is an abundant number, since it is smaller than the sum of its proper divisors (21416433732).

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

12521042568 is a wasteful number, since it uses less digits than its factorization.

12521042568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134982 (or 134975 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 36.

The spelling of 12521042568 in words is "twelve billion, five hundred twenty-one million, forty-two thousand, five hundred sixty-eight".