78310867923 has 6 divisors (see below), whose sum is σ = 113115698124. Its totient is φ = 52207245276.

The previous prime is 78310867883. The next prime is 78310867937. The reversal of 78310867923 is 32976801387.

It is not a de Polignac number, because 78310867923 - 2¹⁶ = 78310802387 is a prime.

It is a super-2 number, since 2×78310867923² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78310867923.

It is not an unprimeable number, because it can be changed into a prime (78310867123) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4350603765 + ... + 4350603782.

It is an arithmetic number, because the mean of its divisors is an integer number (18852616354).

Almost surely, 2^78310867923 is an apocalyptic number.

78310867923 is a deficient number, since it is larger than the sum of its proper divisors (34804830201).

78310867923 is a wasteful number, since it uses less digits than its factorization.

78310867923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8701207553 (or 8701207550 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 54.

The spelling of 78310867923 in words is "seventy-eight billion, three hundred ten million, eight hundred sixty-seven thousand, nine hundred twenty-three".