13768931889 has 6 divisors (see below), whose sum is σ = 19888457186. Its totient is φ = 9179287920.

The previous prime is 13768931881. The next prime is 13768931929. The reversal of 13768931889 is 98813986731.

13768931889 is a `hidden beast` number, since 1 + 376 + 89 + 3 + 188 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 9670755600 + 4098176289 = 98340^2 + 64017^2 .

It is not a de Polignac number, because 13768931889 - 2³ = 13768931881 is a prime.

It is a super-2 number, since 2×13768931889² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13768931881) 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, 764940652 + ... + 764940669.

Almost surely, 2^13768931889 is an apocalyptic number.

It is an amenable number.

13768931889 is a deficient number, since it is larger than the sum of its proper divisors (6119525297).

13768931889 is a wasteful number, since it uses less digits than its factorization.

13768931889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1529881327 (or 1529881324 counting only the distinct ones).

The product of its digits is 15676416, while the sum is 63.

The spelling of 13768931889 in words is "thirteen billion, seven hundred sixty-eight million, nine hundred thirty-one thousand, eight hundred eighty-nine".