80437131640 has 32 divisors (see below), whose sum is σ = 181043412480. Its totient is φ = 32164209792.

The previous prime is 80437131613. The next prime is 80437131659. The reversal of 80437131640 is 4613173408.

It is a self number, because there is not a number n which added to its sum of digits gives 80437131640.

It is a congruent number.

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, 209592 + ... + 452551.

It is an arithmetic number, because the mean of its divisors is an integer number (5657606640).

Almost surely, 2^80437131640 is an apocalyptic number.

It is an amenable number.

80437131640 is an abundant number, since it is smaller than the sum of its proper divisors (100606280840).

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

80437131640 is a wasteful number, since it uses less digits than its factorization.

80437131640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665191 (or 665187 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 37.

The spelling of 80437131640 in words is "eighty billion, four hundred thirty-seven million, one hundred thirty-one thousand, six hundred forty".