22615656161 has 4 divisors (see below), whose sum is σ = 25846464192. Its totient is φ = 19384848132.

The previous prime is 22615656137. The next prime is 22615656163. The reversal of 22615656161 is 16165651622.

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 22615656161 - 2⁶ = 22615656097 is a prime.

It is a super-2 number, since 2×22615656161² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22615656163) 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, 1615404005 + ... + 1615404018.

It is an arithmetic number, because the mean of its divisors is an integer number (6461616048).

Almost surely, 2^22615656161 is an apocalyptic number.

It is an amenable number.

22615656161 is a deficient number, since it is larger than the sum of its proper divisors (3230808031).

22615656161 is an equidigital number, since it uses as much as digits as its factorization.

22615656161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3230808030.

The product of its digits is 129600, while the sum is 41.

The spelling of 22615656161 in words is "twenty-two billion, six hundred fifteen million, six hundred fifty-six thousand, one hundred sixty-one".