11644242137 has 4 divisors (see below), whose sum is σ = 12702809616. Its totient is φ = 10585674660.

The previous prime is 11644242119. The next prime is 11644242163. The reversal of 11644242137 is 73124244611.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 11644242137 - 2³⁰ = 10570500313 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11644242097 and 11644242106.

It is not an unprimeable number, because it can be changed into a prime (11644242737) 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, 529283723 + ... + 529283744.

It is an arithmetic number, because the mean of its divisors is an integer number (3175702404).

Almost surely, 2^11644242137 is an apocalyptic number.

It is an amenable number.

11644242137 is a deficient number, since it is larger than the sum of its proper divisors (1058567479).

11644242137 is a wasteful number, since it uses less digits than its factorization.

11644242137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1058567478.

The product of its digits is 32256, while the sum is 35.

Adding to 11644242137 its reverse (73124244611), we get a palindrome (84768486748).

The spelling of 11644242137 in words is "eleven billion, six hundred forty-four million, two hundred forty-two thousand, one hundred thirty-seven".