11555810839 has 4 divisors (see below), whose sum is σ = 11556252360. Its totient is φ = 11555369320.

The previous prime is 11555810803. The next prime is 11555810891. The reversal of 11555810839 is 93801855511.

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

It is a cyclic number.

It is not a de Polignac number, because 11555810839 - 2¹⁵ = 11555778071 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 (11555810339) 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, 178849 + ... + 234730.

It is an arithmetic number, because the mean of its divisors is an integer number (2889063090).

Almost surely, 2^11555810839 is an apocalyptic number.

11555810839 is a deficient number, since it is larger than the sum of its proper divisors (441521).

11555810839 is an equidigital number, since it uses as much as digits as its factorization.

11555810839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441520.

The product of its (nonzero) digits is 216000, while the sum is 46.

The spelling of 11555810839 in words is "eleven billion, five hundred fifty-five million, eight hundred ten thousand, eight hundred thirty-nine".