11555116535 has 4 divisors (see below), whose sum is σ = 13866139848. Its totient is φ = 9244093224.

The previous prime is 11555116523. The next prime is 11555116543. The reversal of 11555116535 is 53561155511.

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 11555116535 - 2⁶ = 11555116471 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1155511649 + ... + 1155511658.

It is an arithmetic number, because the mean of its divisors is an integer number (3466534962).

Almost surely, 2^11555116535 is an apocalyptic number.

11555116535 is a deficient number, since it is larger than the sum of its proper divisors (2311023313).

11555116535 is an equidigital number, since it uses as much as digits as its factorization.

11555116535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2311023312.

The product of its digits is 56250, while the sum is 38.

The spelling of 11555116535 in words is "eleven billion, five hundred fifty-five million, one hundred sixteen thousand, five hundred thirty-five".