725565513644 has 24 divisors (see below), whose sum is σ = 1345988181888. Its totient is φ = 341046920960.

The previous prime is 725565513643. The next prime is 725565513679. The reversal of 725565513644 is 446315565527.

It is not an unprimeable number, because it can be changed into a prime (725565513643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6123287 + ... + 6240654.

It is an arithmetic number, because the mean of its divisors is an integer number (56082840912).

Almost surely, 2^725565513644 is an apocalyptic number.

It is an amenable number.

725565513644 is a deficient number, since it is larger than the sum of its proper divisors (620422668244).

725565513644 is a wasteful number, since it uses less digits than its factorization.

725565513644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12364825 (or 12364823 counting only the distinct ones).

The product of its digits is 15120000, while the sum is 53.

The spelling of 725565513644 in words is "seven hundred twenty-five billion, five hundred sixty-five million, five hundred thirteen thousand, six hundred forty-four".