117954407991 has 16 divisors (see below), whose sum is σ = 185937984000. Its totient is φ = 65078293728.

The previous prime is 117954407971. The next prime is 117954408031. The reversal of 117954407991 is 199704459711.

It is not a de Polignac number, because 117954407991 - 2⁷ = 117954407863 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117954407971) 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, 96842091 + ... + 96843308.

It is an arithmetic number, because the mean of its divisors is an integer number (11621124000).

Almost surely, 2^117954407991 is an apocalyptic number.

117954407991 is a deficient number, since it is larger than the sum of its proper divisors (67983576009).

117954407991 is a wasteful number, since it uses less digits than its factorization.

117954407991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193685438.

The product of its (nonzero) digits is 2857680, while the sum is 57.

The spelling of 117954407991 in words is "one hundred seventeen billion, nine hundred fifty-four million, four hundred seven thousand, nine hundred ninety-one".