81980962676 has 12 divisors (see below), whose sum is σ = 143470077408. Its totient is φ = 40989511992.

The previous prime is 81980962669. The next prime is 81980962703. The reversal of 81980962676 is 67626908918.

It is a hoax number, since the sum of its digits (62) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31706 + ... + 406161.

It is an arithmetic number, because the mean of its divisors is an integer number (11955839784).

Almost surely, 2^81980962676 is an apocalyptic number.

It is an amenable number.

81980962676 is a deficient number, since it is larger than the sum of its proper divisors (61489114732).

81980962676 is a wasteful number, since it uses less digits than its factorization.

81980962676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484678 (or 484676 counting only the distinct ones).

The product of its (nonzero) digits is 15676416, while the sum is 62.

The spelling of 81980962676 in words is "eighty-one billion, nine hundred eighty million, nine hundred sixty-two thousand, six hundred seventy-six".