16643442413577 has 48 divisors (see below), whose sum is σ = 26146411828992. Its totient is φ = 9388955600640.

The previous prime is 16643442413509. The next prime is 16643442413747. The reversal of 16643442413577 is 77531424434661.

It is not a de Polignac number, because 16643442413577 - 2¹⁵ = 16643442380809 is a prime.

It is a super-2 number, since 2×16643442413577² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16643442412577) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1362208 + ... + 5928110.

It is an arithmetic number, because the mean of its divisors is an integer number (544716913104).

Almost surely, 2^{16643442413577} is an apocalyptic number.

It is an amenable number.

16643442413577 is a deficient number, since it is larger than the sum of its proper divisors (9502969415415).

16643442413577 is a wasteful number, since it uses less digits than its factorization.

16643442413577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4566238 (or 4566231 counting only the distinct ones).

The product of its digits is 40642560, while the sum is 57.

The spelling of 16643442413577 in words is "sixteen trillion, six hundred forty-three billion, four hundred forty-two million, four hundred thirteen thousand, five hundred seventy-seven".