78316918297 has 4 divisors (see below), whose sum is σ = 78431585040. Its totient is φ = 78202251556.

The previous prime is 78316918271. The next prime is 78316918391. The reversal of 78316918297 is 79281961387.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 78316918297 - 2¹⁵ = 78316885529 is a prime.

It is a super-2 number, since 2×78316918297² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78316918237) 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, 57332347 + ... + 57333712.

It is an arithmetic number, because the mean of its divisors is an integer number (19607896260).

Almost surely, 2^78316918297 is an apocalyptic number.

It is an amenable number.

78316918297 is a deficient number, since it is larger than the sum of its proper divisors (114666743).

78316918297 is a wasteful number, since it uses less digits than its factorization.

78316918297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114666742.

The product of its digits is 9144576, while the sum is 61.

The spelling of 78316918297 in words is "seventy-eight billion, three hundred sixteen million, nine hundred eighteen thousand, two hundred ninety-seven".