117199191890 has 32 divisors (see below), whose sum is σ = 233571484224. Its totient is φ = 41981797440.

The previous prime is 117199191839. The next prime is 117199191911. The reversal of 117199191890 is 98191991711.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7943729 + ... + 7958468.

It is an arithmetic number, because the mean of its divisors is an integer number (7299108882).

Almost surely, 2^117199191890 is an apocalyptic number.

117199191890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

117199191890 is a deficient number, since it is larger than the sum of its proper divisors (116372292334).

117199191890 is a wasteful number, since it uses less digits than its factorization.

117199191890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15902282.

The product of its (nonzero) digits is 367416, while the sum is 56.

The spelling of 117199191890 in words is "one hundred seventeen billion, one hundred ninety-nine million, one hundred ninety-one thousand, eight hundred ninety".