117042471891 has 6 divisors (see below), whose sum is σ = 169061348300. Its totient is φ = 78028314588.

The previous prime is 117042471869. The next prime is 117042471899. The reversal of 117042471891 is 198174240711.

117042471891 is a `hidden beast` number, since 1 + 1 + 70 + 424 + 71 + 8 + 91 = 666.

It is not a de Polignac number, because 117042471891 - 2²⁷ = 116908254163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (117042471899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6502359541 + ... + 6502359558.

Almost surely, 2^117042471891 is an apocalyptic number.

117042471891 is a deficient number, since it is larger than the sum of its proper divisors (52018876409).

117042471891 is a wasteful number, since it uses less digits than its factorization.

117042471891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13004719105 (or 13004719102 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 45.

The spelling of 117042471891 in words is "one hundred seventeen billion, forty-two million, four hundred seventy-one thousand, eight hundred ninety-one".