82712978015 has 16 divisors (see below), whose sum is σ = 105116898528. Its totient is φ = 62264518656.

The previous prime is 82712977993. The next prime is 82712978017. The reversal of 82712978015 is 51087921728.

It is a cyclic number.

It is not a de Polignac number, because 82712978015 - 2⁸ = 82712977759 is a prime.

It is a Duffinian number.

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 15 ways as a sum of consecutive naturals, for example, 298439 + ... + 504471.

It is an arithmetic number, because the mean of its divisors is an integer number (6569806158).

Almost surely, 2^82712978015 is an apocalyptic number.

82712978015 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

82712978015 is a deficient number, since it is larger than the sum of its proper divisors (22403920513).

82712978015 is a wasteful number, since it uses less digits than its factorization.

82712978015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210778.

The product of its (nonzero) digits is 564480, while the sum is 50.

The spelling of 82712978015 in words is "eighty-two billion, seven hundred twelve million, nine hundred seventy-eight thousand, fifteen".