72761708737 has 4 divisors (see below), whose sum is σ = 74134571220. Its totient is φ = 71388846256.

The previous prime is 72761708711. The next prime is 72761708749. The reversal of 72761708737 is 73780716727.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 73780716727 = 23 ⋅3207857249.

It can be written as a sum of positive squares in 2 ways, for example, as 49689313921 + 23072394816 = 222911^2 + 151896^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72761708737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72761708707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 686431162 + ... + 686431267.

It is an arithmetic number, because the mean of its divisors is an integer number (18533642805).

Almost surely, 2^72761708737 is an apocalyptic number.

It is an amenable number.

72761708737 is a deficient number, since it is larger than the sum of its proper divisors (1372862483).

72761708737 is a wasteful number, since it uses less digits than its factorization.

72761708737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1372862482.

The product of its (nonzero) digits is 4840416, while the sum is 55.

The spelling of 72761708737 in words is "seventy-two billion, seven hundred sixty-one million, seven hundred eight thousand, seven hundred thirty-seven".