80920920981 has 8 divisors (see below), whose sum is σ = 110190190464. Its totient is φ = 52799466080.

The previous prime is 80920920869. The next prime is 80920921001. The reversal of 80920920981 is 18902902908.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 80920920981 - 2¹⁸ = 80920658837 is a prime.

It is a super-2 number, since 2×80920920981² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 80920920981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80920920481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 286953480 + ... + 286953761.

It is an arithmetic number, because the mean of its divisors is an integer number (13773773808).

Almost surely, 2^80920920981 is an apocalyptic number.

It is an amenable number.

80920920981 is a deficient number, since it is larger than the sum of its proper divisors (29269269483).

80920920981 is a wasteful number, since it uses less digits than its factorization.

80920920981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 573907291.

The product of its (nonzero) digits is 186624, while the sum is 48.

The spelling of 80920920981 in words is "eighty billion, nine hundred twenty million, nine hundred twenty thousand, nine hundred eighty-one".