117956946391 has 2 divisors, whose sum is σ = 117956946392. Its totient is φ = 117956946390.

The previous prime is 117956946389. The next prime is 117956946463. The reversal of 117956946391 is 193649659711.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 117956946391 - 2¹ = 117956946389 is a prime.

Together with 117956946389, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (117956940391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58978473195 + 58978473196.

It is an arithmetic number, because the mean of its divisors is an integer number (58978473196).

Almost surely, 2^117956946391 is an apocalyptic number.

117956946391 is a deficient number, since it is larger than the sum of its proper divisors (1).

117956946391 is an equidigital number, since it uses as much as digits as its factorization.

117956946391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11022480, while the sum is 61.

The spelling of 117956946391 in words is "one hundred seventeen billion, nine hundred fifty-six million, nine hundred forty-six thousand, three hundred ninety-one".