11638444589611 has 12 divisors (see below), whose sum is σ = 13545993013680. Its totient is φ = 9970361286480.

The previous prime is 11638444589573. The next prime is 11638444589623. The reversal of 11638444589611 is 11698544483611.

It is a happy number.

It is not a de Polignac number, because 11638444589611 - 2⁹ = 11638444589099 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11638444589611.

It is not an unprimeable number, because it can be changed into a prime (11638444583611) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64770816 + ... + 64950253.

It is an arithmetic number, because the mean of its divisors is an integer number (1128832751140).

Almost surely, 2^{11638444589611} is an apocalyptic number.

11638444589611 is a deficient number, since it is larger than the sum of its proper divisors (1907548424069).

11638444589611 is a wasteful number, since it uses less digits than its factorization.

11638444589611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129722914 (or 129722907 counting only the distinct ones).

The product of its digits is 19906560, while the sum is 61.

The spelling of 11638444589611 in words is "eleven trillion, six hundred thirty-eight billion, four hundred forty-four million, five hundred eighty-nine thousand, six hundred eleven".