80423976681 has 24 divisors (see below), whose sum is σ = 120485549184. Its totient is φ = 53609279760.

The previous prime is 80423976671. The next prime is 80423976683. The reversal of 80423976681 is 18667932408.

80423976681 is a `hidden beast` number, since 80 + 42 + 397 + 66 + 81 = 666.

It is not a de Polignac number, because 80423976681 - 2⁵ = 80423976649 is a prime.

It is a super-2 number, since 2×80423976681² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (80423976683) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2616655 + ... + 2647211.

It is an arithmetic number, because the mean of its divisors is an integer number (5020231216).

Almost surely, 2^80423976681 is an apocalyptic number.

80423976681 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

It is an amenable number.

80423976681 is a deficient number, since it is larger than the sum of its proper divisors (40061572503).

80423976681 is a wasteful number, since it uses less digits than its factorization.

80423976681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41403 (or 41391 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 54.

The spelling of 80423976681 in words is "eighty billion, four hundred twenty-three million, nine hundred seventy-six thousand, six hundred eighty-one".