78650873665 has 24 divisors (see below), whose sum is σ = 116799547968. Its totient is φ = 49783406400.

The previous prime is 78650873659. The next prime is 78650873671. The reversal of 78650873665 is 56637805687.

It is an interprime number because it is at equal distance from previous prime (78650873659) and next prime (78650873671).

It is not a de Polignac number, because 78650873665 - 2³ = 78650873657 is a prime.

It is a Duffinian number.

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 23 ways as a sum of consecutive naturals, for example, 6642511 + ... + 6654340.

It is an arithmetic number, because the mean of its divisors is an integer number (4866647832).

Almost surely, 2^78650873665 is an apocalyptic number.

It is an amenable number.

78650873665 is a deficient number, since it is larger than the sum of its proper divisors (38148674303).

78650873665 is a wasteful number, since it uses less digits than its factorization.

78650873665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13296889 (or 13296876 counting only the distinct ones).

The product of its (nonzero) digits is 50803200, while the sum is 61.

The spelling of 78650873665 in words is "seventy-eight billion, six hundred fifty million, eight hundred seventy-three thousand, six hundred sixty-five".