78297178163 has 2 divisors, whose sum is σ = 78297178164. Its totient is φ = 78297178162.

The previous prime is 78297178121. The next prime is 78297178189. The reversal of 78297178163 is 36187179287.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78297178163 - 2²⁶ = 78230069299 is a prime.

It is a super-2 number, since 2×78297178163² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78297178763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39148589081 + 39148589082.

It is an arithmetic number, because the mean of its divisors is an integer number (39148589082).

Almost surely, 2^78297178163 is an apocalyptic number.

78297178163 is a deficient number, since it is larger than the sum of its proper divisors (1).

78297178163 is an equidigital number, since it uses as much as digits as its factorization.

78297178163 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7112448, while the sum is 59.

The spelling of 78297178163 in words is "seventy-eight billion, two hundred ninety-seven million, one hundred seventy-eight thousand, one hundred sixty-three".