117900209956 has 27 divisors (see below), whose sum is σ = 219197787249. Its totient is φ = 55476957888.

The previous prime is 117900209951. The next prime is 117900209983. The reversal of 117900209956 is 659902009711.

The square root of 117900209956 is 343366.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 91790820900 + 26109389056 = 302970^2 + 161584^2 .

It is a Duffinian number.

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 8 ways as a sum of consecutive naturals, for example, 11669395 + ... + 11679493.

Almost surely, 2^117900209956 is an apocalyptic number.

117900209956 is the 343366-th square number.

It is an amenable number.

117900209956 is a deficient number, since it is larger than the sum of its proper divisors (101297577293).

117900209956 is an frugal number, since it uses more digits than its factorization.

117900209956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20236 (or 10118 counting only the distinct ones).

The product of its (nonzero) digits is 306180, while the sum is 49.

Multiplying 117900209956 by its sum of digits (49), we get a square (5777110287844 = 2403562²).

The spelling of 117900209956 in words is "one hundred seventeen billion, nine hundred million, two hundred nine thousand, nine hundred fifty-six".