72555508 has 12 divisors (see below), whose sum is σ = 127707300. Its totient is φ = 36067712.

The previous prime is 72555493. The next prime is 72555517. The reversal of 72555508 is 80555527.

It can be written as a sum of positive squares in 2 ways, for example, as 35856144 + 36699364 = 5988^2 + 6058^2 .

It is a super-2 number, since 2×72555508² = 10528603482276128, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51733 + ... + 53116.

It is an arithmetic number, because the mean of its divisors is an integer number (10642275).

Almost surely, 2^72555508 is an apocalyptic number.

It is an amenable number.

72555508 is a deficient number, since it is larger than the sum of its proper divisors (55151792).

72555508 is a wasteful number, since it uses less digits than its factorization.

72555508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105026 (or 105024 counting only the distinct ones).

The product of its (nonzero) digits is 70000, while the sum is 37.

The square root of 72555508 is about 8517.9521012976. The cubic root of 72555508 is about 417.0839351272.

The spelling of 72555508 in words is "seventy-two million, five hundred fifty-five thousand, five hundred eight".