115721656 has 16 divisors (see below), whose sum is σ = 220656600. Its totient is φ = 56879904.

The previous prime is 115721651. The next prime is 115721657. The reversal of 115721656 is 656127511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115721651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122115 + ... + 123058.

Almost surely, 2^115721656 is an apocalyptic number.

It is an amenable number.

115721656 is a deficient number, since it is larger than the sum of its proper divisors (104934944).

115721656 is a wasteful number, since it uses less digits than its factorization.

115721656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245238 (or 245234 counting only the distinct ones).

The product of its digits is 12600, while the sum is 34.

The square root of 115721656 is about 10757.4000576347. The cubic root of 115721656 is about 487.3095022519.

The spelling of 115721656 in words is "one hundred fifteen million, seven hundred twenty-one thousand, six hundred fifty-six".