78960438017 has 2 divisors, whose sum is σ = 78960438018. Its totient is φ = 78960438016.

The previous prime is 78960437987. The next prime is 78960438049. The reversal of 78960438017 is 71083406987.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78960438001 + 16 = 280999^2 + 4^2 .

It is a cyclic number.

It is not a de Polignac number, because 78960438017 - 2¹² = 78960433921 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78960438017.

It is not a weakly prime, because it can be changed into another prime (78960438077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39480219008 + 39480219009.

It is an arithmetic number, because the mean of its divisors is an integer number (39480219009).

Almost surely, 2^78960438017 is an apocalyptic number.

It is an amenable number.

78960438017 is a deficient number, since it is larger than the sum of its proper divisors (1).

78960438017 is an equidigital number, since it uses as much as digits as its factorization.

78960438017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2032128, while the sum is 53.

The spelling of 78960438017 in words is "seventy-eight billion, nine hundred sixty million, four hundred thirty-eight thousand, seventeen".