80897845491 has 12 divisors (see below), whose sum is σ = 120881838480. Its totient is φ = 52072176240.

The previous prime is 80897845487. The next prime is 80897845493. The reversal of 80897845491 is 19454879808.

80897845491 is a `hidden beast` number, since 8 + 0 + 8 + 9 + 7 + 84 + 549 + 1 = 666.

It is not a de Polignac number, because 80897845491 - 2² = 80897845487 is a prime.

It is a super-2 number, since 2×80897845491² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (80897845493) 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, 154976455 + ... + 154976976.

It is an arithmetic number, because the mean of its divisors is an integer number (10073486540).

Almost surely, 2^80897845491 is an apocalyptic number.

80897845491 is a deficient number, since it is larger than the sum of its proper divisors (39983992989).

80897845491 is a wasteful number, since it uses less digits than its factorization.

80897845491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309953466 (or 309953463 counting only the distinct ones).

The product of its (nonzero) digits is 23224320, while the sum is 63.

The spelling of 80897845491 in words is "eighty billion, eight hundred ninety-seven million, eight hundred forty-five thousand, four hundred ninety-one".