16317116305581 has 32 divisors (see below), whose sum is σ = 26777068235008. Its totient is φ = 8606746368000.

The previous prime is 16317116305561. The next prime is 16317116305649. The reversal of 16317116305581 is 18550361171361.

It is not a de Polignac number, because 16317116305581 - 2²¹ = 16317114208429 is a prime.

It is a super-2 number, since 2×16317116305581² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16317116305581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16317116305561) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35809875 + ... + 36262671.

It is an arithmetic number, because the mean of its divisors is an integer number (836783382344).

Almost surely, 2^{16317116305581} is an apocalyptic number.

It is an amenable number.

16317116305581 is a deficient number, since it is larger than the sum of its proper divisors (10459951929427).

16317116305581 is a wasteful number, since it uses less digits than its factorization.

16317116305581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 584821.

The product of its (nonzero) digits is 453600, while the sum is 48.

The spelling of 16317116305581 in words is "sixteen trillion, three hundred seventeen billion, one hundred sixteen million, three hundred five thousand, five hundred eighty-one".