72770554439 has 32 divisors (see below), whose sum is σ = 84883714560. Its totient is φ = 61690896000.

The previous prime is 72770554421. The next prime is 72770554453. The reversal of 72770554439 is 93445507727.

It is a cyclic number.

It is not a de Polignac number, because 72770554439 - 2²⁰ = 72769505863 is a prime.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72770554459) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3641894 + ... + 3661820.

It is an arithmetic number, because the mean of its divisors is an integer number (2652616080).

Almost surely, 2^72770554439 is an apocalyptic number.

72770554439 is a deficient number, since it is larger than the sum of its proper divisors (12113160121).

72770554439 is a wasteful number, since it uses less digits than its factorization.

72770554439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20231.

The product of its (nonzero) digits is 7408800, while the sum is 53.

The spelling of 72770554439 in words is "seventy-two billion, seven hundred seventy million, five hundred fifty-four thousand, four hundred thirty-nine".