72538655 has 16 divisors (see below), whose sum is σ = 100367424. Its totient is φ = 49297920.

The previous prime is 72538639. The next prime is 72538663. The reversal of 72538655 is 55683527.

It is not a de Polignac number, because 72538655 - 2⁴ = 72538639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5216 + ... + 13125.

It is an arithmetic number, because the mean of its divisors is an integer number (6272964).

Almost surely, 2^72538655 is an apocalyptic number.

72538655 is a deficient number, since it is larger than the sum of its proper divisors (27828769).

72538655 is a wasteful number, since it uses less digits than its factorization.

72538655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18466.

The product of its digits is 252000, while the sum is 41.

The square root of 72538655 is about 8516.9627802404. The cubic root of 72538655 is about 417.0516395783.

The spelling of 72538655 in words is "seventy-two million, five hundred thirty-eight thousand, six hundred fifty-five".