13931744164 has 18 divisors (see below), whose sum is σ = 26400244290. Its totient is φ = 6430035456.

The previous prime is 13931744153. The next prime is 13931744191. The reversal of 13931744164 is 46144713931.

It can be written as a sum of positive squares in 3 ways, for example, as 1024512064 + 12907232100 = 32008^2 + 113610^2 .

It is a super-2 number, since 2×13931744164² (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 13931744164.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10303869 + ... + 10305220.

Almost surely, 2^13931744164 is an apocalyptic number.

It is an amenable number.

13931744164 is a deficient number, since it is larger than the sum of its proper divisors (12468500126).

13931744164 is a wasteful number, since it uses less digits than its factorization.

13931744164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20609119 (or 20609104 counting only the distinct ones).

The product of its digits is 217728, while the sum is 43.

The spelling of 13931744164 in words is "thirteen billion, nine hundred thirty-one million, seven hundred forty-four thousand, one hundred sixty-four".