11161313555 has 16 divisors (see below), whose sum is σ = 15458503104. Its totient is φ = 7577692800.

The previous prime is 11161313539. The next prime is 11161313561. The reversal of 11161313555 is 55531316111.

It is not a de Polignac number, because 11161313555 - 2⁴ = 11161313539 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1575152 + ... + 1582221.

It is an arithmetic number, because the mean of its divisors is an integer number (966156444).

Almost surely, 2^11161313555 is an apocalyptic number.

11161313555 is a deficient number, since it is larger than the sum of its proper divisors (4297189549).

11161313555 is a wasteful number, since it uses less digits than its factorization.

11161313555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3157486.

The product of its digits is 6750, while the sum is 32.

Adding to 11161313555 its reverse (55531316111), we get a palindrome (66692629666).

The spelling of 11161313555 in words is "eleven billion, one hundred sixty-one million, three hundred thirteen thousand, five hundred fifty-five".