725601816 has 24 divisors (see below), whose sum is σ = 1965171780. Its totient is φ = 241867248.

The previous prime is 725601809. The next prime is 725601829. The reversal of 725601816 is 618106527.

725601816 is a `hidden beast` number, since 72 + 560 + 18 + 16 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5038830 + ... + 5038973.

Almost surely, 2^725601816 is an apocalyptic number.

It is an amenable number.

725601816 is an abundant number, since it is smaller than the sum of its proper divisors (1239569964).

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

725601816 is a wasteful number, since it uses less digits than its factorization.

725601816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10077815 (or 10077808 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 725601816 is about 26936.9971600399. The cubic root of 725601816 is about 898.5993918308.

The spelling of 725601816 in words is "seven hundred twenty-five million, six hundred one thousand, eight hundred sixteen".