80686881616 has 40 divisors (see below), whose sum is σ = 172231306848. Its totient is φ = 36312720000.

The previous prime is 80686881607. The next prime is 80686881619. The reversal of 80686881616 is 61618868608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80686881619) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2251770 + ... + 2287321.

Almost surely, 2^80686881616 is an apocalyptic number.

It is an amenable number.

80686881616 is an abundant number, since it is smaller than the sum of its proper divisors (91544425232).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

80686881616 is a wasteful number, since it uses less digits than its factorization.

80686881616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4539211 (or 4539205 counting only the distinct ones).

The product of its (nonzero) digits is 5308416, while the sum is 58.

The spelling of 80686881616 in words is "eighty billion, six hundred eighty-six million, eight hundred eighty-one thousand, six hundred sixteen".