72648537 has 12 divisors (see below), whose sum is σ = 104889744. Its totient is φ = 44706480.

The previous prime is 72648487. The next prime is 72648553. The reversal of 72648537 is 73584627.

It is not a de Polignac number, because 72648537 - 2¹⁰ = 72647513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72648557) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71139 + ... + 72152.

It is an arithmetic number, because the mean of its divisors is an integer number (8740812).

Almost surely, 2^72648537 is an apocalyptic number.

It is an amenable number.

72648537 is a deficient number, since it is larger than the sum of its proper divisors (32241207).

72648537 is a wasteful number, since it uses less digits than its factorization.

72648537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143320 (or 143307 counting only the distinct ones).

The product of its digits is 282240, while the sum is 42.

The square root of 72648537 is about 8523.4111129289. The cubic root of 72648537 is about 417.2621174645.

The spelling of 72648537 in words is "seventy-two million, six hundred forty-eight thousand, five hundred thirty-seven".