9916161931 has 24 divisors (see below), whose sum is σ = 11608072784. Its totient is φ = 8414461440.

The previous prime is 9916161917. The next prime is 9916161947. The reversal of 9916161931 is 1391616199.

It is not a de Polignac number, because 9916161931 - 2¹³ = 9916153739 is a prime.

It is a super-2 number, since 2×9916161931² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9916161911) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 130861 + ... + 192241.

Almost surely, 2^9916161931 is an apocalyptic number.

9916161931 is a deficient number, since it is larger than the sum of its proper divisors (1691910853).

9916161931 is a wasteful number, since it uses less digits than its factorization.

9916161931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61471 (or 61454 counting only the distinct ones).

The product of its digits is 78732, while the sum is 46.

The square root of 9916161931 is about 99579.9273498430. The cubic root of 9916161931 is about 2148.3969973742.

The spelling of 9916161931 in words is "nine billion, nine hundred sixteen million, one hundred sixty-one thousand, nine hundred thirty-one".