72365786881 has 16 divisors (see below), whose sum is σ = 77916686400. Its totient is φ = 66967234048.

The previous prime is 72365786879. The next prime is 72365786893. The reversal of 72365786881 is 18868756327.

It is not a de Polignac number, because 72365786881 - 2¹ = 72365786879 is a prime.

It is a super-2 number, since 2×72365786881² (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 (72365786081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 137226 + ... + 404428.

It is an arithmetic number, because the mean of its divisors is an integer number (4869792900).

Almost surely, 2^72365786881 is an apocalyptic number.

It is an amenable number.

72365786881 is a deficient number, since it is larger than the sum of its proper divisors (5550899519).

72365786881 is a wasteful number, since it uses less digits than its factorization.

72365786881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267488.

The product of its digits is 27095040, while the sum is 61.

The spelling of 72365786881 in words is "seventy-two billion, three hundred sixty-five million, seven hundred eighty-six thousand, eight hundred eighty-one".