117811809790 has 16 divisors (see below), whose sum is σ = 216992915568. Its totient is φ = 46028799936.

The previous prime is 117811809761. The next prime is 117811809809. The reversal of 117811809790 is 97908118711.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136990047 + ... + 136990906.

It is an arithmetic number, because the mean of its divisors is an integer number (13562057223).

Almost surely, 2^117811809790 is an apocalyptic number.

117811809790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

117811809790 is a deficient number, since it is larger than the sum of its proper divisors (99181105778).

117811809790 is a wasteful number, since it uses less digits than its factorization.

117811809790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273981003.

The product of its (nonzero) digits is 254016, while the sum is 52.

The spelling of 117811809790 in words is "one hundred seventeen billion, eight hundred eleven million, eight hundred nine thousand, seven hundred ninety".