82378139968 has 28 divisors (see below), whose sum is σ = 164968852180. Its totient is φ = 40811185152.

The previous prime is 82378139951. The next prime is 82378139981. The reversal of 82378139968 is 86993187328.

It can be written as a sum of positive squares in 2 ways, for example, as 33179351104 + 49198788864 = 182152^2 + 221808^2 .

It is a Harshad number since it is a multiple of its sum of digits (64).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5897421 + ... + 5911372.

Almost surely, 2^82378139968 is an apocalyptic number.

It is an amenable number.

82378139968 is an abundant number, since it is smaller than the sum of its proper divisors (82590712212).

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

82378139968 is a wasteful number, since it uses less digits than its factorization.

82378139968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11808914 (or 11808904 counting only the distinct ones).

The product of its digits is 31352832, while the sum is 64.

The spelling of 82378139968 in words is "eighty-two billion, three hundred seventy-eight million, one hundred thirty-nine thousand, nine hundred sixty-eight".