117900209955 has 64 divisors (see below), whose sum is σ = 214854405120. Its totient is φ = 54648422400.

The previous prime is 117900209951. The next prime is 117900209983. The reversal of 117900209955 is 559902009711.

It is a Cunningham number, because it is equal to 343366²-1.

It is not a de Polignac number, because 117900209955 - 2² = 117900209951 is a prime.

It is a super-2 number, since 2×117900209955² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (117900209951) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7889931 + ... + 7904859.

It is an arithmetic number, because the mean of its divisors is an integer number (3357100080).

Almost surely, 2^117900209955 is an apocalyptic number.

117900209955 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

117900209955 is a deficient number, since it is larger than the sum of its proper divisors (96954195165).

117900209955 is a wasteful number, since it uses less digits than its factorization.

117900209955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17052.

The product of its (nonzero) digits is 255150, while the sum is 48.

The spelling of 117900209955 in words is "one hundred seventeen billion, nine hundred million, two hundred nine thousand, nine hundred fifty-five".