11564853908583 has 4 divisors (see below), whose sum is σ = 15419805211448. Its totient is φ = 7709902605720.

The previous prime is 11564853908551. The next prime is 11564853908591. The reversal of 11564853908583 is 38580935846511.

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

It is not a de Polignac number, because 11564853908583 - 2⁵ = 11564853908551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11564853906583) 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, 1927475651428 + ... + 1927475651433.

It is an arithmetic number, because the mean of its divisors is an integer number (3854951302862).

Almost surely, 2^{11564853908583} is an apocalyptic number.

11564853908583 is a deficient number, since it is larger than the sum of its proper divisors (3854951302865).

11564853908583 is an equidigital number, since it uses as much as digits as its factorization.

11564853908583 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3854951302864.

The product of its (nonzero) digits is 124416000, while the sum is 66.

The spelling of 11564853908583 in words is "eleven trillion, five hundred sixty-four billion, eight hundred fifty-three million, nine hundred eight thousand, five hundred eighty-three".