72558737 has 8 divisors (see below), whose sum is σ = 77254632. Its totient is φ = 67910400.

The previous prime is 72558713. The next prime is 72558743. The reversal of 72558737 is 73785527.

It can be written as a sum of positive squares in 4 ways, for example, as 495616 + 72063121 = 704^2 + 8489^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72558737 - 2¹⁸ = 72296593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72558137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8714 + ... + 14867.

It is an arithmetic number, because the mean of its divisors is an integer number (9656829).

Almost surely, 2^72558737 is an apocalyptic number.

It is an amenable number.

72558737 is a deficient number, since it is larger than the sum of its proper divisors (4695895).

72558737 is a wasteful number, since it uses less digits than its factorization.

72558737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23779.

The product of its digits is 411600, while the sum is 44.

The square root of 72558737 is about 8518.1416400527. The cubic root of 72558737 is about 417.0901223167.

The spelling of 72558737 in words is "seventy-two million, five hundred fifty-eight thousand, seven hundred thirty-seven".