82712978016 has 24 divisors (see below), whose sum is σ = 217121567544. Its totient is φ = 27570992640.

The previous prime is 82712977993. The next prime is 82712978017. The reversal of 82712978016 is 61087921728.

It is a tau number, because it is divible by the number of its divisors (24).

It is a self number, because there is not a number n which added to its sum of digits gives 82712978016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82712978017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 430796665 + ... + 430796856.

It is an arithmetic number, because the mean of its divisors is an integer number (9046731981).

Almost surely, 2^82712978016 is an apocalyptic number.

It is an amenable number.

82712978016 is an abundant number, since it is smaller than the sum of its proper divisors (134408589528).

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

82712978016 is a wasteful number, since it uses less digits than its factorization.

82712978016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 861593534 (or 861593526 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 51.

The spelling of 82712978016 in words is "eighty-two billion, seven hundred twelve million, nine hundred seventy-eight thousand, sixteen".