406685422961 has 2 divisors, whose sum is σ = 406685422962. Its totient is φ = 406685422960.

The previous prime is 406685422939. The next prime is 406685423009. The reversal of 406685422961 is 169224586604.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 400333332961 + 6352090000 = 632719^2 + 79700^2 .

It is a cyclic number.

It is not a de Polignac number, because 406685422961 - 2²⁶ = 406618314097 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (406685422931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203342711480 + 203342711481.

It is an arithmetic number, because the mean of its divisors is an integer number (203342711481).

Almost surely, 2^406685422961 is an apocalyptic number.

It is an amenable number.

406685422961 is a deficient number, since it is larger than the sum of its proper divisors (1).

406685422961 is an equidigital number, since it uses as much as digits as its factorization.

406685422961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4976640, while the sum is 53.

The spelling of 406685422961 in words is "four hundred six billion, six hundred eighty-five million, four hundred twenty-two thousand, nine hundred sixty-one".