16161312243 has 16 divisors (see below), whose sum is σ = 22246963200. Its totient is φ = 10425042240.

The previous prime is 16161312203. The next prime is 16161312281. The reversal of 16161312243 is 34221316161.

It is not a de Polignac number, because 16161312243 - 2¹⁴ = 16161295859 is a prime.

It is a super-2 number, since 2×16161312243² (a number of 21 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 16161312243.

It is not an unprimeable number, because it can be changed into a prime (16161312203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1004698 + ... + 1020656.

It is an arithmetic number, because the mean of its divisors is an integer number (1390435200).

Almost surely, 2^16161312243 is an apocalyptic number.

16161312243 is a deficient number, since it is larger than the sum of its proper divisors (6085650957).

16161312243 is a wasteful number, since it uses less digits than its factorization.

16161312243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26882.

The product of its digits is 5184, while the sum is 30.

The spelling of 16161312243 in words is "sixteen billion, one hundred sixty-one million, three hundred twelve thousand, two hundred forty-three".