168520104505 has 16 divisors (see below), whose sum is σ = 205209083520. Its totient is φ = 132838359552.

The previous prime is 168520104451. The next prime is 168520104517. The reversal of 168520104505 is 505401025861.

It is a cyclic number.

It is not a de Polignac number, because 168520104505 - 2¹³ = 168520096313 is a prime.

It is a super-2 number, since 2×168520104505² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 655245 + ... + 875434.

It is an arithmetic number, because the mean of its divisors is an integer number (12825567720).

Almost surely, 2^168520104505 is an apocalyptic number.

It is an amenable number.

168520104505 is a deficient number, since it is larger than the sum of its proper divisors (36688979015).

168520104505 is a wasteful number, since it uses less digits than its factorization.

168520104505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1531008.

The product of its (nonzero) digits is 48000, while the sum is 37.

The spelling of 168520104505 in words is "one hundred sixty-eight billion, five hundred twenty million, one hundred four thousand, five hundred five".