22167121649 has 4 divisors (see below), whose sum is σ = 22167479664. Its totient is φ = 22166763636.

The previous prime is 22167121643. The next prime is 22167121679. The reversal of 22167121649 is 94612176122.

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-22167121649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22167121643) 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, 59567 + ... + 218820.

It is an arithmetic number, because the mean of its divisors is an integer number (5541869916).

Almost surely, 2^22167121649 is an apocalyptic number.

It is an amenable number.

22167121649 is a deficient number, since it is larger than the sum of its proper divisors (358015).

22167121649 is an equidigital number, since it uses as much as digits as its factorization.

22167121649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358014.

The product of its digits is 72576, while the sum is 41.

The spelling of 22167121649 in words is "twenty-two billion, one hundred sixty-seven million, one hundred twenty-one thousand, six hundred forty-nine".