80647365771 has 20 divisors (see below), whose sum is σ = 137683687152. Its totient is φ = 46084208688.

The previous prime is 80647365769. The next prime is 80647365811. The reversal of 80647365771 is 17756374608.

80647365771 is a `hidden beast` number, since 8 + 0 + 64 + 7 + 3 + 6 + 577 + 1 = 666.

It is not a de Polignac number, because 80647365771 - 2¹ = 80647365769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (80647367771) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 71117040 + ... + 71118173.

Almost surely, 2^80647365771 is an apocalyptic number.

80647365771 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

80647365771 is a deficient number, since it is larger than the sum of its proper divisors (57036321381).

80647365771 is a wasteful number, since it uses less digits than its factorization.

80647365771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142235232 (or 142235223 counting only the distinct ones).

The product of its (nonzero) digits is 5927040, while the sum is 54.

The spelling of 80647365771 in words is "eighty billion, six hundred forty-seven million, three hundred sixty-five thousand, seven hundred seventy-one".