163315651691 has 2 divisors, whose sum is σ = 163315651692. Its totient is φ = 163315651690.

The previous prime is 163315651621. The next prime is 163315651703. The reversal of 163315651691 is 196156513361.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 163315651691 - 2¹⁸ = 163315389547 is a prime.

It is not a weakly prime, because it can be changed into another prime (163315651621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81657825845 + 81657825846.

It is an arithmetic number, because the mean of its divisors is an integer number (81657825846).

Almost surely, 2^163315651691 is an apocalyptic number.

163315651691 is a deficient number, since it is larger than the sum of its proper divisors (1).

163315651691 is an equidigital number, since it uses as much as digits as its factorization.

163315651691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 437400, while the sum is 47.

The spelling of 163315651691 in words is "one hundred sixty-three billion, three hundred fifteen million, six hundred fifty-one thousand, six hundred ninety-one".