72654656 has 14 divisors (see below), whose sum is σ = 144174210. Its totient is φ = 36327296.

The previous prime is 72654619. The next prime is 72654661. The reversal of 72654656 is 65645627.

It can be written as a sum of positive squares in only one way, i.e., 41473600 + 31181056 = 6440^2 + 5584^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 567551 + ... + 567678.

Almost surely, 2^72654656 is an apocalyptic number.

It is an amenable number.

72654656 is a deficient number, since it is larger than the sum of its proper divisors (71519554).

72654656 is a wasteful number, since it uses less digits than its factorization.

72654656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1135241 (or 1135231 counting only the distinct ones).

The product of its digits is 302400, while the sum is 41.

The square root of 72654656 is about 8523.7700579028. The cubic root of 72654656 is about 417.2738321083.

The spelling of 72654656 in words is "seventy-two million, six hundred fifty-four thousand, six hundred fifty-six".