117878341957 has 4 divisors (see below), whose sum is σ = 117891827136. Its totient is φ = 117864856780.

The previous prime is 117878341949. The next prime is 117878341981. The reversal of 117878341957 is 759143878711.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 117878341957 - 2³ = 117878341949 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 117878341895 and 117878341904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117878341907) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6729469 + ... + 6746962.

It is an arithmetic number, because the mean of its divisors is an integer number (29472956784).

Almost surely, 2^117878341957 is an apocalyptic number.

It is an amenable number.

117878341957 is a deficient number, since it is larger than the sum of its proper divisors (13485179).

117878341957 is an equidigital number, since it uses as much as digits as its factorization.

117878341957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13485178.

The product of its digits is 11854080, while the sum is 61.

The spelling of 117878341957 in words is "one hundred seventeen billion, eight hundred seventy-eight million, three hundred forty-one thousand, nine hundred fifty-seven".