11621403617 has 4 divisors (see below), whose sum is σ = 11622062100. Its totient is φ = 11620745136.

The previous prime is 11621403589. The next prime is 11621403623. The reversal of 11621403617 is 71630412611.

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 1926244321 + 9695159296 = 43889^2 + 98464^2 .

It is a cyclic number.

It is not a de Polignac number, because 11621403617 - 2¹⁶ = 11621338081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11621403217) 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, 302018 + ... + 338315.

It is an arithmetic number, because the mean of its divisors is an integer number (2905515525).

Almost surely, 2^11621403617 is an apocalyptic number.

It is an amenable number.

11621403617 is a deficient number, since it is larger than the sum of its proper divisors (658483).

11621403617 is an equidigital number, since it uses as much as digits as its factorization.

11621403617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 658482.

The product of its (nonzero) digits is 6048, while the sum is 32.

The spelling of 11621403617 in words is "eleven billion, six hundred twenty-one million, four hundred three thousand, six hundred seventeen".