78265813163 has 2 divisors, whose sum is σ = 78265813164. Its totient is φ = 78265813162.

The previous prime is 78265813159. The next prime is 78265813201. The reversal of 78265813163 is 36131856287.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78265813163 - 2² = 78265813159 is a prime.

It is a super-2 number, since 2×78265813163² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78265813063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39132906581 + 39132906582.

It is an arithmetic number, because the mean of its divisors is an integer number (39132906582).

Almost surely, 2^78265813163 is an apocalyptic number.

78265813163 is a deficient number, since it is larger than the sum of its proper divisors (1).

78265813163 is an equidigital number, since it uses as much as digits as its factorization.

78265813163 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1451520, while the sum is 50.

The spelling of 78265813163 in words is "seventy-eight billion, two hundred sixty-five million, eight hundred thirteen thousand, one hundred sixty-three".