169316668513 has 4 divisors (see below), whose sum is σ = 169535707668. Its totient is φ = 169097629360.

The previous prime is 169316668487. The next prime is 169316668517. The reversal of 169316668513 is 315866613961.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 315866613961 = 853 ⋅370300837.

It can be written as a sum of positive squares in 2 ways, for example, as 95445777249 + 73870891264 = 308943^2 + 271792^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-169316668513 is a prime.

It is a super-2 number, since 2×169316668513² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (169316668517) 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, 109518418 + ... + 109519963.

It is an arithmetic number, because the mean of its divisors is an integer number (42383926917).

Almost surely, 2^169316668513 is an apocalyptic number.

It is an amenable number.

169316668513 is a deficient number, since it is larger than the sum of its proper divisors (219039155).

169316668513 is an equidigital number, since it uses as much as digits as its factorization.

169316668513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219039154.

The product of its digits is 4199040, while the sum is 55.

The spelling of 169316668513 in words is "one hundred sixty-nine billion, three hundred sixteen million, six hundred sixty-eight thousand, five hundred thirteen".