115421866722 has 18 divisors (see below), whose sum is σ = 250083834273. Its totient is φ = 38473475112.

The previous prime is 115421866711. The next prime is 115421866739. The reversal of 115421866722 is 227668124511.

115421866722 is a `hidden beast` number, since 1 + 1 + 542 + 1 + 86 + 6 + 7 + 22 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 115199826921 + 222039801 = 339411^2 + 14901^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=240231.

It is a super-2 number, since 2×115421866722² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1401348 + ... + 1481424.

Almost surely, 2^115421866722 is an apocalyptic number.

115421866722 is an abundant number, since it is smaller than the sum of its proper divisors (134661967551).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

115421866722 is an frugal number, since it uses more digits than its factorization.

115421866722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160162 (or 80082 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The spelling of 115421866722 in words is "one hundred fifteen billion, four hundred twenty-one million, eight hundred sixty-six thousand, seven hundred twenty-two".