13958117091 has 12 divisors (see below), whose sum is σ = 20217890160. Its totient is φ = 9279488880.

The previous prime is 13958117083. The next prime is 13958117093. The reversal of 13958117091 is 19071185931.

It is a happy number.

13958117091 is a `hidden beast` number, since 1 + 395 + 8 + 1 + 170 + 91 = 666.

It is not a de Polignac number, because 13958117091 - 2³ = 13958117083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13958117093) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2156800 + ... + 2163261.

It is an arithmetic number, because the mean of its divisors is an integer number (1684824180).

Almost surely, 2^13958117091 is an apocalyptic number.

13958117091 is a deficient number, since it is larger than the sum of its proper divisors (6259773069).

13958117091 is a wasteful number, since it uses less digits than its factorization.

13958117091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4320426 (or 4320423 counting only the distinct ones).

The product of its (nonzero) digits is 68040, while the sum is 45.

The spelling of 13958117091 in words is "thirteen billion, nine hundred fifty-eight million, one hundred seventeen thousand, ninety-one".