72502564 has 6 divisors (see below), whose sum is σ = 126879494. Its totient is φ = 36251280.

The previous prime is 72502561. The next prime is 72502567. The reversal of 72502564 is 46520527.

It is an interprime number because it is at equal distance from previous prime (72502561) and next prime (72502567).

It can be written as a sum of positive squares in only one way, i.e., 43665664 + 28836900 = 6608^2 + 5370^2 .

It is not an unprimeable number, because it can be changed into a prime (72502561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9062817 + ... + 9062824.

Almost surely, 2^72502564 is an apocalyptic number.

It is an amenable number.

72502564 is a deficient number, since it is larger than the sum of its proper divisors (54376930).

72502564 is a wasteful number, since it uses less digits than its factorization.

72502564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18125645 (or 18125643 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 31.

The square root of 72502564 is about 8514.8437448963. The cubic root of 72502564 is about 416.9824612544.

The spelling of 72502564 in words is "seventy-two million, five hundred two thousand, five hundred sixty-four".