117992738647 has 8 divisors (see below), whose sum is σ = 137717968896. Its totient is φ = 98984789592.

The previous prime is 117992738639. The next prime is 117992738657. The reversal of 117992738647 is 746837299711.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 117992738647 - 2³ = 117992738639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117992738657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 179319943 + ... + 179320600.

It is an arithmetic number, because the mean of its divisors is an integer number (17214746112).

Almost surely, 2^117992738647 is an apocalyptic number.

117992738647 is a deficient number, since it is larger than the sum of its proper divisors (19725230249).

117992738647 is an equidigital number, since it uses as much as digits as its factorization.

117992738647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358640597.

The product of its digits is 32006016, while the sum is 64.

The spelling of 117992738647 in words is "one hundred seventeen billion, nine hundred ninety-two million, seven hundred thirty-eight thousand, six hundred forty-seven".