80961831584 has 48 divisors (see below), whose sum is σ = 168001170120. Its totient is φ = 38347545600.

The previous prime is 80961831523. The next prime is 80961831617. The reversal of 80961831584 is 48513816908.

It can be written as a sum of positive squares in 4 ways, for example, as 70193203600 + 10768627984 = 264940^2 + 103772^2 .

It is a Harshad number since it is a multiple of its sum of digits (53).

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, 773867 + ... + 872234.

Almost surely, 2^80961831584 is an apocalyptic number.

It is an amenable number.

80961831584 is an abundant number, since it is smaller than the sum of its proper divisors (87039338536).

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

80961831584 is a wasteful number, since it uses less digits than its factorization.

80961831584 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1646193 (or 1646185 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 53.

The spelling of 80961831584 in words is "eighty billion, nine hundred sixty-one million, eight hundred thirty-one thousand, five hundred eighty-four".