82779417880 has 32 divisors (see below), whose sum is σ = 187720266240. Its totient is φ = 32851042560.

The previous prime is 82779417871. The next prime is 82779417943. The reversal of 82779417880 is 8871497728.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8142501 + ... + 8152660.

It is an arithmetic number, because the mean of its divisors is an integer number (5866258320).

Almost surely, 2^82779417880 is an apocalyptic number.

It is an amenable number.

82779417880 is an abundant number, since it is smaller than the sum of its proper divisors (104940848360).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

82779417880 is a wasteful number, since it uses less digits than its factorization.

82779417880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16295299 (or 16295295 counting only the distinct ones).

The product of its (nonzero) digits is 12644352, while the sum is 61.

The spelling of 82779417880 in words is "eighty-two billion, seven hundred seventy-nine million, four hundred seventeen thousand, eight hundred eighty".