72772318771 has 4 divisors (see below), whose sum is σ = 72781708032. Its totient is φ = 72762929512.

The previous prime is 72772318769. The next prime is 72772318777. The reversal of 72772318771 is 17781327727.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17781327727 = 31 ⋅573591217.

It is a cyclic number.

It is not a de Polignac number, because 72772318771 - 2¹ = 72772318769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72772318777) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4682995 + ... + 4698508.

It is an arithmetic number, because the mean of its divisors is an integer number (18195427008).

Almost surely, 2^72772318771 is an apocalyptic number.

72772318771 is a deficient number, since it is larger than the sum of its proper divisors (9389261).

72772318771 is an equidigital number, since it uses as much as digits as its factorization.

72772318771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9389260.

The product of its digits is 1613472, while the sum is 52.

The spelling of 72772318771 in words is "seventy-two billion, seven hundred seventy-two million, three hundred eighteen thousand, seven hundred seventy-one".