117890777849178 has 16 divisors (see below), whose sum is σ = 235781787931776. Its totient is φ = 39296887244160.

The previous prime is 117890777849177. The next prime is 117890777849183. The reversal of 117890777849178 is 871948777098711.

It is a self number, because there is not a number n which added to its sum of digits gives 117890777849178.

It is not an unprimeable number, because it can be changed into a prime (117890777849177) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2688951 + ... + 15588842.

It is an arithmetic number, because the mean of its divisors is an integer number (14736361745736).

Almost surely, 2^{117890777849178} is an apocalyptic number.

117890777849178 is an abundant number, since it is smaller than the sum of its proper divisors (117891010082598).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

117890777849178 is a wasteful number, since it uses less digits than its factorization.

117890777849178 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19352789.

The product of its (nonzero) digits is 2788079616, while the sum is 84.

The spelling of 117890777849178 in words is "one hundred seventeen trillion, eight hundred ninety billion, seven hundred seventy-seven million, eight hundred forty-nine thousand, one hundred seventy-eight".