725693863978 has 16 divisors (see below), whose sum is σ = 1102000497696. Its totient is φ = 358363101040.

The previous prime is 725693863963. The next prime is 725693863987. The reversal of 725693863978 is 879368396527.

725693863978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 725693863978.

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, 150733 + ... + 1214128.

It is an arithmetic number, because the mean of its divisors is an integer number (68875031106).

Almost surely, 2^725693863978 is an apocalyptic number.

725693863978 is a deficient number, since it is larger than the sum of its proper divisors (376306633718).

725693863978 is a wasteful number, since it uses less digits than its factorization.

725693863978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1368149.

The product of its digits is 823011840, while the sum is 73.

The spelling of 725693863978 in words is "seven hundred twenty-five billion, six hundred ninety-three million, eight hundred sixty-three thousand, nine hundred seventy-eight".