11613312553 has 4 divisors (see below), whose sum is σ = 11803694788. Its totient is φ = 11422930320.

The previous prime is 11613312499. The next prime is 11613312577. The reversal of 11613312553 is 35521331611.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6722688064 + 4890624489 = 81992^2 + 69933^2 .

It is a cyclic number.

It is not a de Polignac number, because 11613312553 - 2²⁵ = 11579758121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11613312253) 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, 95191026 + ... + 95191147.

It is an arithmetic number, because the mean of its divisors is an integer number (2950923697).

Almost surely, 2^11613312553 is an apocalyptic number.

It is an amenable number.

11613312553 is a deficient number, since it is larger than the sum of its proper divisors (190382235).

11613312553 is an equidigital number, since it uses as much as digits as its factorization.

11613312553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190382234.

The product of its digits is 8100, while the sum is 31.

The spelling of 11613312553 in words is "eleven billion, six hundred thirteen million, three hundred twelve thousand, five hundred fifty-three".