80921779983 has 12 divisors (see below), whose sum is σ = 127513108008. Its totient is φ = 49043502960.

The previous prime is 80921779963. The next prime is 80921779993. The reversal of 80921779983 is 38997712908.

It is not a de Polignac number, because 80921779983 - 2¹⁴ = 80921763599 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 80921779983.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80921779963) 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, 408695760 + ... + 408695957.

It is an arithmetic number, because the mean of its divisors is an integer number (10626092334).

Almost surely, 2^80921779983 is an apocalyptic number.

80921779983 is a deficient number, since it is larger than the sum of its proper divisors (46591328025).

80921779983 is a wasteful number, since it uses less digits than its factorization.

80921779983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 817391734 (or 817391731 counting only the distinct ones).

The product of its (nonzero) digits is 13716864, while the sum is 63.

The spelling of 80921779983 in words is "eighty billion, nine hundred twenty-one million, seven hundred seventy-nine thousand, nine hundred eighty-three".