115581586687 has 4 divisors (see below), whose sum is σ = 132093241936. Its totient is φ = 99069931440.

The previous prime is 115581586669. The next prime is 115581586723. The reversal of 115581586687 is 786685185511.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-115581586687 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 (115581584687) 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, 8255827614 + ... + 8255827627.

It is an arithmetic number, because the mean of its divisors is an integer number (33023310484).

Almost surely, 2^115581586687 is an apocalyptic number.

115581586687 is a deficient number, since it is larger than the sum of its proper divisors (16511655249).

115581586687 is an equidigital number, since it uses as much as digits as its factorization.

115581586687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16511655248.

The product of its digits is 16128000, while the sum is 61.

The spelling of 115581586687 in words is "one hundred fifteen billion, five hundred eighty-one million, five hundred eighty-six thousand, six hundred eighty-seven".