80818444772 has 24 divisors (see below), whose sum is σ = 152319665400. Its totient is φ = 37298866176.

The previous prime is 80818444753. The next prime is 80818444781. The reversal of 80818444772 is 27744481808.

It can be written as a sum of positive squares in 4 ways, for example, as 6324384676 + 74494060096 = 79526^2 + 272936^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1562054 + ... + 1612962.

It is an arithmetic number, because the mean of its divisors is an integer number (6346652725).

Almost surely, 2^80818444772 is an apocalyptic number.

It is an amenable number.

80818444772 is a deficient number, since it is larger than the sum of its proper divisors (71501220628).

80818444772 is a wasteful number, since it uses less digits than its factorization.

80818444772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81455 (or 81453 counting only the distinct ones).

The product of its (nonzero) digits is 3211264, while the sum is 53.

The spelling of 80818444772 in words is "eighty billion, eight hundred eighteen million, four hundred forty-four thousand, seven hundred seventy-two".