22406649977 has 2 divisors, whose sum is σ = 22406649978. Its totient is φ = 22406649976.

The previous prime is 22406649971. The next prime is 22406650027. The reversal of 22406649977 is 77994660422.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13099031401 + 9307618576 = 114451^2 + 96476^2 .

It is a cyclic number.

It is not a de Polignac number, because 22406649977 - 2⁸ = 22406649721 is a prime.

It is not a weakly prime, because it can be changed into another prime (22406649971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11203324988 + 11203324989.

It is an arithmetic number, because the mean of its divisors is an integer number (11203324989).

Almost surely, 2^22406649977 is an apocalyptic number.

It is an amenable number.

22406649977 is a deficient number, since it is larger than the sum of its proper divisors (1).

22406649977 is an equidigital number, since it uses as much as digits as its factorization.

22406649977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9144576, while the sum is 56.

The spelling of 22406649977 in words is "twenty-two billion, four hundred six million, six hundred forty-nine thousand, nine hundred seventy-seven".