725492664 has 144 divisors (see below), whose sum is σ = 2151091800. Its totient is φ = 220776192.

The previous prime is 725492653. The next prime is 725492693. The reversal of 725492664 is 466294527.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1326039 + ... + 1326585.

Almost surely, 2^725492664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 725492664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1075545900).

725492664 is an abundant number, since it is smaller than the sum of its proper divisors (1425599136).

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

725492664 is a wasteful number, since it uses less digits than its factorization.

725492664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 694 (or 674 counting only the distinct ones).

The product of its digits is 725760, while the sum is 45.

The square root of 725492664 is about 26934.9710228172. The cubic root of 725492664 is about 898.5543309185.

The spelling of 725492664 in words is "seven hundred twenty-five million, four hundred ninety-two thousand, six hundred sixty-four".