80971939616 has 12 divisors (see below), whose sum is σ = 159413506182. Its totient is φ = 40485969792.

The previous prime is 80971939577. The next prime is 80971939681. The reversal of 80971939616 is 61693917908.

It can be written as a sum of positive squares in only one way, i.e., 42164515600 + 38807424016 = 205340^2 + 196996^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1265186525 + ... + 1265186588.

Almost surely, 2^80971939616 is an apocalyptic number.

It is an amenable number.

80971939616 is a deficient number, since it is larger than the sum of its proper divisors (78441566566).

80971939616 is a wasteful number, since it uses less digits than its factorization.

80971939616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2530373123 (or 2530373115 counting only the distinct ones).

The product of its (nonzero) digits is 4408992, while the sum is 59.

The spelling of 80971939616 in words is "eighty billion, nine hundred seventy-one million, nine hundred thirty-nine thousand, six hundred sixteen".