115581977 has 16 divisors (see below), whose sum is σ = 136642560. Its totient is φ = 95713488.

The previous prime is 115581953. The next prime is 115582009. The reversal of 115581977 is 779185511.

It is a cyclic number.

It is not a de Polignac number, because 115581977 - 2¹⁰ = 115580953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115581577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23768 + ... + 28214.

It is an arithmetic number, because the mean of its divisors is an integer number (8540160).

Almost surely, 2^115581977 is an apocalyptic number.

It is an amenable number.

115581977 is a deficient number, since it is larger than the sum of its proper divisors (21060583).

115581977 is an equidigital number, since it uses as much as digits as its factorization.

115581977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4580.

The product of its digits is 88200, while the sum is 44.

The square root of 115581977 is about 10750.9058688094. The cubic root of 115581977 is about 487.1133583008.

The spelling of 115581977 in words is "one hundred fifteen million, five hundred eighty-one thousand, nine hundred seventy-seven".