82777938732 has 18 divisors (see below), whose sum is σ = 209244234108. Its totient is φ = 27592646232.

The previous prime is 82777938709. The next prime is 82777938751. The reversal of 82777938732 is 23783977728.

It is a tau number, because it is divible by the number of its divisors (18).

It is a self number, because there is not a number n which added to its sum of digits gives 82777938732.

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 5 ways as a sum of consecutive naturals, for example, 1149693558 + ... + 1149693629.

Almost surely, 2^82777938732 is an apocalyptic number.

It is an amenable number.

82777938732 is an abundant number, since it is smaller than the sum of its proper divisors (126466295376).

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

82777938732 is a wasteful number, since it uses less digits than its factorization.

82777938732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2299387197 (or 2299387192 counting only the distinct ones).

The product of its digits is 49787136, while the sum is 63.

The spelling of 82777938732 in words is "eighty-two billion, seven hundred seventy-seven million, nine hundred thirty-eight thousand, seven hundred thirty-two".