115555428687 has 4 divisors (see below), whose sum is σ = 154073904920. Its totient is φ = 77036952456.

The previous prime is 115555428643. The next prime is 115555428701. The reversal of 115555428687 is 786824555511.

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

It is not a de Polignac number, because 115555428687 - 2¹⁸ = 115555166543 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 (115555428887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19259238112 + ... + 19259238117.

It is an arithmetic number, because the mean of its divisors is an integer number (38518476230).

Almost surely, 2^115555428687 is an apocalyptic number.

115555428687 is a deficient number, since it is larger than the sum of its proper divisors (38518476233).

115555428687 is an equidigital number, since it uses as much as digits as its factorization.

115555428687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38518476232.

The product of its digits is 13440000, while the sum is 57.

The spelling of 115555428687 in words is "one hundred fifteen billion, five hundred fifty-five million, four hundred twenty-eight thousand, six hundred eighty-seven".