163245490517 has 2 divisors, whose sum is σ = 163245490518. Its totient is φ = 163245490516.

The previous prime is 163245490511. The next prime is 163245490543. The reversal of 163245490517 is 715094542361.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 163172370916 + 73119601 = 403946^2 + 8551^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-163245490517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (163245490511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81622745258 + 81622745259.

It is an arithmetic number, because the mean of its divisors is an integer number (81622745259).

Almost surely, 2^163245490517 is an apocalyptic number.

It is an amenable number.

163245490517 is a deficient number, since it is larger than the sum of its proper divisors (1).

163245490517 is an equidigital number, since it uses as much as digits as its factorization.

163245490517 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 907200, while the sum is 47.

The spelling of 163245490517 in words is "one hundred sixty-three billion, two hundred forty-five million, four hundred ninety thousand, five hundred seventeen".