163245645517 has 4 divisors (see below), whose sum is σ = 163262949760. Its totient is φ = 163228341276.

The previous prime is 163245645509. The next prime is 163245645553. The reversal of 163245645517 is 715546542361.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 163245645517 - 2³ = 163245645509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163245645617) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8637963 + ... + 8656840.

It is an arithmetic number, because the mean of its divisors is an integer number (40815737440).

Almost surely, 2^163245645517 is an apocalyptic number.

It is an amenable number.

163245645517 is a deficient number, since it is larger than the sum of its proper divisors (17304243).

163245645517 is an equidigital number, since it uses as much as digits as its factorization.

163245645517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17304242.

The product of its digits is 3024000, while the sum is 49.

The spelling of 163245645517 in words is "one hundred sixty-three billion, two hundred forty-five million, six hundred forty-five thousand, five hundred seventeen".