405773366661 has 24 divisors (see below), whose sum is σ = 634473532056. Its totient is φ = 248412856320.

The previous prime is 405773366659. The next prime is 405773366681. The reversal of 405773366661 is 166663377504.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 26828474436 + 378944892225 = 163794^2 + 615585^2 .

It is not a de Polignac number, because 405773366661 - 2¹ = 405773366659 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 405773366598 and 405773366607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405773366641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8962260 + ... + 9007421.

It is an arithmetic number, because the mean of its divisors is an integer number (26436397169).

Almost surely, 2^405773366661 is an apocalyptic number.

It is an amenable number.

405773366661 is a deficient number, since it is larger than the sum of its proper divisors (228700165395).

405773366661 is a wasteful number, since it uses less digits than its factorization.

405773366661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17969893 (or 17969890 counting only the distinct ones).

The product of its (nonzero) digits is 11430720, while the sum is 54.

The spelling of 405773366661 in words is "four hundred five billion, seven hundred seventy-three million, three hundred sixty-six thousand, six hundred sixty-one".