115663851 has 24 divisors (see below), whose sum is σ = 174620160. Its totient is φ = 73701936.

The previous prime is 115663819. The next prime is 115663859. The reversal of 115663851 is 158366511.

115663851 is a `hidden beast` number, since 1 + 15 + 6 + 638 + 5 + 1 = 666.

It is not a de Polignac number, because 115663851 - 2⁵ = 115663819 is a prime.

It is not an unprimeable number, because it can be changed into a prime (115663859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15010 + ... + 21368.

It is an arithmetic number, because the mean of its divisors is an integer number (7275840).

Almost surely, 2^115663851 is an apocalyptic number.

115663851 is a deficient number, since it is larger than the sum of its proper divisors (58956309).

115663851 is a wasteful number, since it uses less digits than its factorization.

115663851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6455 (or 6452 counting only the distinct ones).

The product of its digits is 21600, while the sum is 36.

The square root of 115663851 is about 10754.7129668811. The cubic root of 115663851 is about 487.2283488523.

The spelling of 115663851 in words is "one hundred fifteen million, six hundred sixty-three thousand, eight hundred fifty-one".