22004611961 has 2 divisors, whose sum is σ = 22004611962. Its totient is φ = 22004611960.

The previous prime is 22004611933. The next prime is 22004612011. The reversal of 22004611961 is 16911640022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20723329936 + 1281282025 = 143956^2 + 35795^2 .

It is a cyclic number.

It is not a de Polignac number, because 22004611961 - 2¹⁸ = 22004349817 is a prime.

It is not a weakly prime, because it can be changed into another prime (22004611901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11002305980 + 11002305981.

It is an arithmetic number, because the mean of its divisors is an integer number (11002305981).

Almost surely, 2^22004611961 is an apocalyptic number.

It is an amenable number.

22004611961 is a deficient number, since it is larger than the sum of its proper divisors (1).

22004611961 is an equidigital number, since it uses as much as digits as its factorization.

22004611961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 32.

The spelling of 22004611961 in words is "twenty-two billion, four million, six hundred eleven thousand, nine hundred sixty-one".