11442638969 has 4 divisors (see below), whose sum is σ = 11708746896. Its totient is φ = 11176531044.

The previous prime is 11442638939. The next prime is 11442638971. The reversal of 11442638969 is 96983624411.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11442638969 is a prime.

It is a super-2 number, since 2×11442638969² (a number of 21 digits) contains 22 as substring.

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 11442638969.

It is not an unprimeable number, because it can be changed into a prime (11442638929) 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, 133053899 + ... + 133053984.

It is an arithmetic number, because the mean of its divisors is an integer number (2927186724).

Almost surely, 2^11442638969 is an apocalyptic number.

It is an amenable number.

11442638969 is a deficient number, since it is larger than the sum of its proper divisors (266107927).

11442638969 is an equidigital number, since it uses as much as digits as its factorization.

11442638969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266107926.

The product of its digits is 2239488, while the sum is 53.

The spelling of 11442638969 in words is "eleven billion, four hundred forty-two million, six hundred thirty-eight thousand, nine hundred sixty-nine".