78734118713 has 2 divisors, whose sum is σ = 78734118714. Its totient is φ = 78734118712.

The previous prime is 78734118709. The next prime is 78734118737. The reversal of 78734118713 is 31781143787.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74034056464 + 4700062249 = 272092^2 + 68557^2 .

It is a cyclic number.

It is not a de Polignac number, because 78734118713 - 2² = 78734118709 is a prime.

It is a super-2 number, since 2×78734118713² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78734111713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39367059356 + 39367059357.

It is an arithmetic number, because the mean of its divisors is an integer number (39367059357).

Almost surely, 2^78734118713 is an apocalyptic number.

It is an amenable number.

78734118713 is a deficient number, since it is larger than the sum of its proper divisors (1).

78734118713 is an equidigital number, since it uses as much as digits as its factorization.

78734118713 is an evil number, because the sum of its binary digits is even.

The product of its digits is 790272, while the sum is 50.

The spelling of 78734118713 in words is "seventy-eight billion, seven hundred thirty-four million, one hundred eighteen thousand, seven hundred thirteen".