16163239394 has 16 divisors (see below), whose sum is σ = 24328495800. Its totient is φ = 8053785600.

The previous prime is 16163239387. The next prime is 16163239423. The reversal of 16163239394 is 49393236161.

It can be written as a sum of positive squares in 4 ways, for example, as 8655883369 + 7507356025 = 93037^2 + 86645^2 .

It is a super-2 number, since 2×16163239394² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 755444 + ... + 776544.

Almost surely, 2^16163239394 is an apocalyptic number.

16163239394 is a deficient number, since it is larger than the sum of its proper divisors (8165256406).

16163239394 is a wasteful number, since it uses less digits than its factorization.

16163239394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22405.

The product of its digits is 629856, while the sum is 47.

The spelling of 16163239394 in words is "sixteen billion, one hundred sixty-three million, two hundred thirty-nine thousand, three hundred ninety-four".