78317375207 has 2 divisors, whose sum is σ = 78317375208. Its totient is φ = 78317375206.

The previous prime is 78317375179. The next prime is 78317375239. The reversal of 78317375207 is 70257371387.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78317375207 is a prime.

It is a super-2 number, since 2×78317375207² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78317375107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39158687603 + 39158687604.

It is an arithmetic number, because the mean of its divisors is an integer number (39158687604).

Almost surely, 2^78317375207 is an apocalyptic number.

78317375207 is a deficient number, since it is larger than the sum of its proper divisors (1).

78317375207 is an equidigital number, since it uses as much as digits as its factorization.

78317375207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728720, while the sum is 50.

The spelling of 78317375207 in words is "seventy-eight billion, three hundred seventeen million, three hundred seventy-five thousand, two hundred seven".