72658757539 has 4 divisors (see below), whose sum is σ = 73378151280. Its totient is φ = 71939363800.

The previous prime is 72658757459. The next prime is 72658757543. The reversal of 72658757539 is 93575785627.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93575785627 = 101 ⋅926492927.

It is a cyclic number.

It is not a de Polignac number, because 72658757539 - 2⁷ = 72658757411 is a prime.

It is a super-2 number, since 2×72658757539² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72658757569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 359696719 + ... + 359696920.

It is an arithmetic number, because the mean of its divisors is an integer number (18344537820).

Almost surely, 2^72658757539 is an apocalyptic number.

72658757539 is a deficient number, since it is larger than the sum of its proper divisors (719393741).

72658757539 is a wasteful number, since it uses less digits than its factorization.

72658757539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 719393740.

The product of its digits is 111132000, while the sum is 64.

The spelling of 72658757539 in words is "seventy-two billion, six hundred fifty-eight million, seven hundred fifty-seven thousand, five hundred thirty-nine".