117715420447 has 4 divisors (see below), whose sum is σ = 118134336816. Its totient is φ = 117296504080.

The previous prime is 117715420429. The next prime is 117715420477. The reversal of 117715420447 is 744024517711.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 117715420447 - 2²³ = 117707031839 is a prime.

It is a super-2 number, since 2×117715420447² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117715420477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 209457763 + ... + 209458324.

It is an arithmetic number, because the mean of its divisors is an integer number (29533584204).

Almost surely, 2^117715420447 is an apocalyptic number.

117715420447 is a deficient number, since it is larger than the sum of its proper divisors (418916369).

117715420447 is an equidigital number, since it uses as much as digits as its factorization.

117715420447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418916368.

The product of its (nonzero) digits is 219520, while the sum is 43.

The spelling of 117715420447 in words is "one hundred seventeen billion, seven hundred fifteen million, four hundred twenty thousand, four hundred forty-seven".