16312523161 has 6 divisors (see below), whose sum is σ = 17930294186. Its totient is φ = 14829566400.

The previous prime is 16312523159. The next prime is 16312523191. The reversal of 16312523161 is 16132521361.

It can be written as a sum of positive squares in only one way, i.e., 14854734400 + 1457788761 = 121880^2 + 38181^2 .

It is not a de Polignac number, because 16312523161 - 2¹ = 16312523159 is a prime.

It is a super-2 number, since 2×16312523161² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16312523191) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 67407000 + ... + 67407241.

Almost surely, 2^16312523161 is an apocalyptic number.

16312523161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16312523161 is a deficient number, since it is larger than the sum of its proper divisors (1617771025).

16312523161 is a wasteful number, since it uses less digits than its factorization.

16312523161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134814263 (or 134814252 counting only the distinct ones).

The product of its digits is 6480, while the sum is 31.

The spelling of 16312523161 in words is "sixteen billion, three hundred twelve million, five hundred twenty-three thousand, one hundred sixty-one".