115661161 has 8 divisors (see below), whose sum is σ = 144201024. Its totient is φ = 90125520.

The previous prime is 115661159. The next prime is 115661177. The reversal of 115661161 is 161166511.

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 115661161 - 2¹ = 115661159 is a prime.

It is not an unprimeable number, because it can be changed into a prime (115661111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 750970 + ... + 751123.

It is an arithmetic number, because the mean of its divisors is an integer number (18025128).

Almost surely, 2^115661161 is an apocalyptic number.

115661161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

115661161 is a deficient number, since it is larger than the sum of its proper divisors (28539863).

115661161 is a wasteful number, since it uses less digits than its factorization.

115661161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1502111.

The product of its digits is 1080, while the sum is 28.

The square root of 115661161 is about 10754.5879047037. The cubic root of 115661161 is about 487.2245716583.

The spelling of 115661161 in words is "one hundred fifteen million, six hundred sixty-one thousand, one hundred sixty-one".