725573177728 has 64 divisors (see below), whose sum is σ = 1685688516000. Its totient is φ = 310959914496.

The previous prime is 725573177717. The next prime is 725573177729. The reversal of 725573177728 is 827771375527.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (725573177729) 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, 8219275 + ... + 8307082.

Almost surely, 2^725573177728 is an apocalyptic number.

It is an amenable number.

725573177728 is an abundant number, since it is smaller than the sum of its proper divisors (960115338272).

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

725573177728 is an equidigital number, since it uses as much as digits as its factorization.

725573177728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16526392 (or 16526366 counting only the distinct ones).

The product of its digits is 40336800, while the sum is 61.

The spelling of 725573177728 in words is "seven hundred twenty-five billion, five hundred seventy-three million, one hundred seventy-seven thousand, seven hundred twenty-eight".