78327314731 has 12 divisors (see below), whose sum is σ = 82936168392. Its totient is φ = 73963010304.

The previous prime is 78327314719. The next prime is 78327314771. The reversal of 78327314731 is 13741372387.

It is not a de Polignac number, because 78327314731 - 2¹¹ = 78327312683 is a prime.

It is a super-2 number, since 2×78327314731² (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 (78327314771) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 242550 + ... + 464203.

It is an arithmetic number, because the mean of its divisors is an integer number (6911347366).

Almost surely, 2^78327314731 is an apocalyptic number.

78327314731 is a deficient number, since it is larger than the sum of its proper divisors (4608853661).

78327314731 is a wasteful number, since it uses less digits than its factorization.

78327314731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707098 (or 707079 counting only the distinct ones).

The product of its digits is 592704, while the sum is 46.

The spelling of 78327314731 in words is "seventy-eight billion, three hundred twenty-seven million, three hundred fourteen thousand, seven hundred thirty-one".