725755520 has 64 divisors (see below), whose sum is σ = 1982880000. Its totient is φ = 248828928.

The previous prime is 725755489. The next prime is 725755523. The reversal of 725755520 is 25557527.

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

It is not an unprimeable number, because it can be changed into a prime (725755523) 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, 76520 + ... + 85479.

It is an arithmetic number, because the mean of its divisors is an integer number (30982500).

Almost surely, 2^725755520 is an apocalyptic number.

725755520 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

725755520 is an abundant number, since it is smaller than the sum of its proper divisors (1257124480).

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

725755520 is a wasteful number, since it uses less digits than its factorization.

725755520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162025 (or 162013 counting only the distinct ones).

The product of its (nonzero) digits is 122500, while the sum is 38.

The square root of 725755520 is about 26939.8500367021. The cubic root of 725755520 is about 898.6628373581.

The spelling of 725755520 in words is "seven hundred twenty-five million, seven hundred fifty-five thousand, five hundred twenty".