643017160745 has 16 divisors (see below), whose sum is σ = 774198846720. Its totient is φ = 512695310400.

The previous prime is 643017160693. The next prime is 643017160831. The reversal of 643017160745 is 547061710346.

It is a de Polignac number, because none of the positive numbers 2^k-643017160745 is a prime.

It is a super-2 number, since 2×643017160745² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 643017160696 and 643017160705.

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, 15263060 + ... + 15305130.

It is an arithmetic number, because the mean of its divisors is an integer number (48387427920).

Almost surely, 2^643017160745 is an apocalyptic number.

It is an amenable number.

643017160745 is a deficient number, since it is larger than the sum of its proper divisors (131181685975).

643017160745 is a wasteful number, since it uses less digits than its factorization.

643017160745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52216.

The product of its (nonzero) digits is 423360, while the sum is 44.

The spelling of 643017160745 in words is "six hundred forty-three billion, seventeen million, one hundred sixty thousand, seven hundred forty-five".