725644895 has 8 divisors (see below), whose sum is σ = 874577760. Its totient is φ = 577980000.

The previous prime is 725644883. The next prime is 725644901. The reversal of 725644895 is 598446527.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 725644895 - 2²⁰ = 724596319 is a prime.

It is a super-2 number, since 2×725644895² = 1053121027279122050, which contains 22 as substring.

It is a congruent number.

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, 315731 + ... + 318020.

It is an arithmetic number, because the mean of its divisors is an integer number (109322220).

Almost surely, 2^725644895 is an apocalyptic number.

725644895 is a deficient number, since it is larger than the sum of its proper divisors (148932865).

725644895 is a wasteful number, since it uses less digits than its factorization.

725644895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 633985.

The product of its digits is 2419200, while the sum is 50.

The square root of 725644895 is about 26937.7967733072. The cubic root of 725644895 is about 898.6171747692.

The spelling of 725644895 in words is "seven hundred twenty-five million, six hundred forty-four thousand, eight hundred ninety-five".