11555795999 has 16 divisors (see below), whose sum is σ = 13213476864. Its totient is φ = 10003408800.

The previous prime is 11555795983. The next prime is 11555796013. The reversal of 11555795999 is 99959755511.

It is not a de Polignac number, because 11555795999 - 2⁴ = 11555795983 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 (11555795959) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45992 + ... + 158829.

It is an arithmetic number, because the mean of its divisors is an integer number (825842304).

Almost surely, 2^11555795999 is an apocalyptic number.

11555795999 is a deficient number, since it is larger than the sum of its proper divisors (1657680865).

11555795999 is a wasteful number, since it uses less digits than its factorization.

11555795999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205078.

The product of its digits is 28704375, while the sum is 65.

The spelling of 11555795999 in words is "eleven billion, five hundred fifty-five million, seven hundred ninety-five thousand, nine hundred ninety-nine".