11551161593 has 4 divisors (see below), whose sum is σ = 11949477540. Its totient is φ = 11152845648.

The previous prime is 11551161569. The next prime is 11551161623. The reversal of 11551161593 is 39516115511.

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 4204614649 + 7346546944 = 64843^2 + 85712^2 .

It is a cyclic number.

It is not a de Polignac number, because 11551161593 - 2¹⁸ = 11550899449 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11551161533) 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, 199157930 + ... + 199157987.

It is an arithmetic number, because the mean of its divisors is an integer number (2987369385).

Almost surely, 2^11551161593 is an apocalyptic number.

It is an amenable number.

11551161593 is a deficient number, since it is larger than the sum of its proper divisors (398315947).

11551161593 is an equidigital number, since it uses as much as digits as its factorization.

11551161593 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398315946.

The product of its digits is 20250, while the sum is 38.

The spelling of 11551161593 in words is "eleven billion, five hundred fifty-one million, one hundred sixty-one thousand, five hundred ninety-three".