80897879961 has 12 divisors (see below), whose sum is σ = 120621928960. Its totient is φ = 52192180440.

The previous prime is 80897879917. The next prime is 80897879977. The reversal of 80897879961 is 16997879808.

It is not a de Polignac number, because 80897879961 - 2⁹ = 80897879449 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 80897879961.

It is not an unprimeable number, because it can be changed into a prime (80897879761) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 144978001 + ... + 144978558.

Almost surely, 2^80897879961 is an apocalyptic number.

It is an amenable number.

80897879961 is a deficient number, since it is larger than the sum of its proper divisors (39724048999).

80897879961 is a wasteful number, since it uses less digits than its factorization.

80897879961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289956596 (or 289956593 counting only the distinct ones).

The product of its (nonzero) digits is 109734912, while the sum is 72.

The spelling of 80897879961 in words is "eighty billion, eight hundred ninety-seven million, eight hundred seventy-nine thousand, nine hundred sixty-one".