22220642641 has 2 divisors, whose sum is σ = 22220642642. Its totient is φ = 22220642640.

The previous prime is 22220642627. The next prime is 22220642713. The reversal of 22220642641 is 14624602222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15097282641 + 7123360000 = 122871^2 + 84400^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22220642641 is a prime.

It is not a weakly prime, because it can be changed into another prime (22220642611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11110321320 + 11110321321.

It is an arithmetic number, because the mean of its divisors is an integer number (11110321321).

Almost surely, 2^22220642641 is an apocalyptic number.

It is an amenable number.

22220642641 is a deficient number, since it is larger than the sum of its proper divisors (1).

22220642641 is an equidigital number, since it uses as much as digits as its factorization.

22220642641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18432, while the sum is 31.

The spelling of 22220642641 in words is "twenty-two billion, two hundred twenty million, six hundred forty-two thousand, six hundred forty-one".