115661955 has 8 divisors (see below), whose sum is σ = 185059152. Its totient is φ = 61686368.

The previous prime is 115661933. The next prime is 115661969. The reversal of 115661955 is 559166511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 115661955 - 2⁶ = 115661891 is a prime.

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, 3855384 + ... + 3855413.

It is an arithmetic number, because the mean of its divisors is an integer number (23132394).

Almost surely, 2^115661955 is an apocalyptic number.

115661955 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

115661955 is a deficient number, since it is larger than the sum of its proper divisors (69397197).

115661955 is an equidigital number, since it uses as much as digits as its factorization.

115661955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7710805.

The product of its digits is 40500, while the sum is 39.

The square root of 115661955 is about 10754.6248191185. The cubic root of 115661955 is about 487.2256865685.

The spelling of 115661955 in words is "one hundred fifteen million, six hundred sixty-one thousand, nine hundred fifty-five".