82765439892 has 36 divisors (see below), whose sum is σ = 209957194356. Its totient is φ = 27490296960.

The previous prime is 82765439863. The next prime is 82765439927. The reversal of 82765439892 is 29893456728.

82765439892 is a `hidden beast` number, since 8 + 2 + 7 + 6 + 543 + 9 + 89 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 26749910916 + 56015528976 = 163554^2 + 236676^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4080703 + ... + 4100934.

Almost surely, 2^82765439892 is an apocalyptic number.

It is an amenable number.

82765439892 is an abundant number, since it is smaller than the sum of its proper divisors (127191754464).

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

82765439892 is a wasteful number, since it uses less digits than its factorization.

82765439892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8181928 (or 8181923 counting only the distinct ones).

The product of its digits is 52254720, while the sum is 63.

The spelling of 82765439892 in words is "eighty-two billion, seven hundred sixty-five million, four hundred thirty-nine thousand, eight hundred ninety-two".