163613568971 has 2 divisors, whose sum is σ = 163613568972. Its totient is φ = 163613568970.

The previous prime is 163613568931. The next prime is 163613568983. The reversal of 163613568971 is 179865316361.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 163613568971 - 2¹⁴ = 163613552587 is a prime.

It is not a weakly prime, because it can be changed into another prime (163613568931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81806784485 + 81806784486.

It is an arithmetic number, because the mean of its divisors is an integer number (81806784486).

Almost surely, 2^163613568971 is an apocalyptic number.

163613568971 is a deficient number, since it is larger than the sum of its proper divisors (1).

163613568971 is an equidigital number, since it uses as much as digits as its factorization.

163613568971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4898880, while the sum is 56.

The spelling of 163613568971 in words is "one hundred sixty-three billion, six hundred thirteen million, five hundred sixty-eight thousand, nine hundred seventy-one".