72769052861 has 4 divisors (see below), whose sum is σ = 72924875712. Its totient is φ = 72613230012.

The previous prime is 72769052833. The next prime is 72769052897. The reversal of 72769052861 is 16825096727.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72769052861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72769057861) 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, 77910725 + ... + 77911658.

It is an arithmetic number, because the mean of its divisors is an integer number (18231218928).

Almost surely, 2^72769052861 is an apocalyptic number.

It is an amenable number.

72769052861 is a deficient number, since it is larger than the sum of its proper divisors (155822851).

72769052861 is a wasteful number, since it uses less digits than its factorization.

72769052861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155822850.

The product of its (nonzero) digits is 2540160, while the sum is 53.

The spelling of 72769052861 in words is "seventy-two billion, seven hundred sixty-nine million, fifty-two thousand, eight hundred sixty-one".