72562509 has 6 divisors (see below), whose sum is σ = 104812526. Its totient is φ = 48375000.

The previous prime is 72562471. The next prime is 72562517. The reversal of 72562509 is 90526527.

72562509 is a `hidden beast` number, since 7 + 25 + 625 + 0 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 58522500 + 14040009 = 7650^2 + 3747^2 .

It is not a de Polignac number, because 72562509 - 2⁸ = 72562253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72562519) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4031242 + ... + 4031259.

Almost surely, 2^72562509 is an apocalyptic number.

It is an amenable number.

72562509 is a deficient number, since it is larger than the sum of its proper divisors (32250017).

72562509 is a wasteful number, since it uses less digits than its factorization.

72562509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8062507 (or 8062504 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 36.

The square root of 72562509 is about 8518.3630469709. The cubic root of 72562509 is about 417.0973497334.

The spelling of 72562509 in words is "seventy-two million, five hundred sixty-two thousand, five hundred nine".