115561877 has 8 divisors (see below), whose sum is σ = 118625592. Its totient is φ = 112536000.

The previous prime is 115561871. The next prime is 115561879. The reversal of 115561877 is 778165511.

It can be written as a sum of positive squares in 4 ways, for example, as 20421361 + 95140516 = 4519^2 + 9754^2 .

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 115561877 - 2²⁴ = 98784661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115561871) 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, 3218 + ... + 15539.

It is an arithmetic number, because the mean of its divisors is an integer number (14828199).

Almost surely, 2^115561877 is an apocalyptic number.

It is an amenable number.

115561877 is a deficient number, since it is larger than the sum of its proper divisors (3063715).

115561877 is a wasteful number, since it uses less digits than its factorization.

115561877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18919.

The product of its digits is 58800, while the sum is 41.

The square root of 115561877 is about 10749.9710232168. The cubic root of 115561877 is about 487.0851199129.

The spelling of 115561877 in words is "one hundred fifteen million, five hundred sixty-one thousand, eight hundred seventy-seven".