117578117885 has 4 divisors (see below), whose sum is σ = 141093741468. Its totient is φ = 94062494304.

The previous prime is 117578117851. The next prime is 117578117887. The reversal of 117578117885 is 588711875711.

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

It can be written as a sum of positive squares in 2 ways, for example, as 62710677241 + 54867440644 = 250421^2 + 234238^2 .

It is a cyclic number.

It is not a de Polignac number, because 117578117885 - 2¹⁰ = 117578116861 is a prime.

It is a super-2 number, since 2×117578117885² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117578117887) 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, 11757811784 + ... + 11757811793.

It is an arithmetic number, because the mean of its divisors is an integer number (35273435367).

Almost surely, 2^117578117885 is an apocalyptic number.

It is an amenable number.

117578117885 is a deficient number, since it is larger than the sum of its proper divisors (23515623583).

117578117885 is an equidigital number, since it uses as much as digits as its factorization.

117578117885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23515623582.

The product of its digits is 4390400, while the sum is 59.

The spelling of 117578117885 in words is "one hundred seventeen billion, five hundred seventy-eight million, one hundred seventeen thousand, eight hundred eighty-five".