655724672 has 16 divisors (see below), whose sum is σ = 1306326750. Its totient is φ = 327862272.

The previous prime is 655724659. The next prime is 655724717. The reversal of 655724672 is 276427556.

It can be written as a sum of positive squares in only one way, i.e., 485056576 + 170668096 = 22024^2 + 13064^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2561297 + ... + 2561552.

Almost surely, 2^655724672 is an apocalyptic number.

It is an amenable number.

655724672 is a deficient number, since it is larger than the sum of its proper divisors (650602078).

655724672 is an equidigital number, since it uses as much as digits as its factorization.

655724672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5122863 (or 5122851 counting only the distinct ones).

The product of its digits is 705600, while the sum is 44.

The square root of 655724672 is about 25607.1215094551. The cubic root of 655724672 is about 868.7747194319.

The spelling of 655724672 in words is "six hundred fifty-five million, seven hundred twenty-four thousand, six hundred seventy-two".