22776621161 has 4 divisors (see below), whose sum is σ = 26030424192. Its totient is φ = 19522818132.

The previous prime is 22776621139. The next prime is 22776621169. The reversal of 22776621161 is 16112667722.

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 not a de Polignac number, because 22776621161 - 2²⁶ = 22709512297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22776621169) 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, 1626901505 + ... + 1626901518.

It is an arithmetic number, because the mean of its divisors is an integer number (6507606048).

Almost surely, 2^22776621161 is an apocalyptic number.

It is an amenable number.

22776621161 is a deficient number, since it is larger than the sum of its proper divisors (3253803031).

22776621161 is an equidigital number, since it uses as much as digits as its factorization.

22776621161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3253803030.

The product of its digits is 84672, while the sum is 41.

The spelling of 22776621161 in words is "twenty-two billion, seven hundred seventy-six million, six hundred twenty-one thousand, one hundred sixty-one".