13898318391 has 16 divisors (see below), whose sum is σ = 20716427520. Its totient is φ = 9208698840.

The previous prime is 13898318387. The next prime is 13898318407. The reversal of 13898318391 is 19381389831.

13898318391 is a `hidden beast` number, since 1 + 389 + 83 + 183 + 9 + 1 = 666.

It is not a de Polignac number, because 13898318391 - 2² = 13898318387 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13898328391) 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, 1574595 + ... + 1583396.

It is an arithmetic number, because the mean of its divisors is an integer number (1294776720).

Almost surely, 2^13898318391 is an apocalyptic number.

13898318391 is a deficient number, since it is larger than the sum of its proper divisors (6818109129).

13898318391 is a wasteful number, since it uses less digits than its factorization.

13898318391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3158163 (or 3158157 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 54.

The spelling of 13898318391 in words is "thirteen billion, eight hundred ninety-eight million, three hundred eighteen thousand, three hundred ninety-one".