78287914731 has 24 divisors (see below), whose sum is σ = 114946896960. Its totient is φ = 47360597856.

The previous prime is 78287914729. The next prime is 78287914741. The reversal of 78287914731 is 13741978287.

It is not a de Polignac number, because 78287914731 - 2¹ = 78287914729 is a prime.

It is a super-2 number, since 2×78287914731² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (78287914741) by changing a digit.

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, 1278681 + ... + 1338506.

It is an arithmetic number, because the mean of its divisors is an integer number (4789454040).

Almost surely, 2^78287914731 is an apocalyptic number.

78287914731 is a deficient number, since it is larger than the sum of its proper divisors (36658982229).

78287914731 is a wasteful number, since it uses less digits than its factorization.

78287914731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2617275 (or 2617262 counting only the distinct ones).

The product of its digits is 4741632, while the sum is 57.

The spelling of 78287914731 in words is "seventy-eight billion, two hundred eighty-seven million, nine hundred fourteen thousand, seven hundred thirty-one".