405866262722 has 6 divisors (see below), whose sum is σ = 608800745529. Its totient is φ = 202932680880.

The previous prime is 405866262709. The next prime is 405866262829. The reversal of 405866262722 is 227262668504.

It can be written as a sum of positive squares in 2 ways, for example, as 219165358801 + 186700903921 = 468151^2 + 432089^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=450481.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 675722 + ... + 1126202.

Almost surely, 2^405866262722 is an apocalyptic number.

405866262722 is a deficient number, since it is larger than the sum of its proper divisors (202934482807).

405866262722 is an frugal number, since it uses more digits than its factorization.

405866262722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 900964 (or 450483 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 50.

Multiplying 405866262722 by its sum of digits (50), we get a square (20293313136100 = 4504810²).

The spelling of 405866262722 in words is "four hundred five billion, eight hundred sixty-six million, two hundred sixty-two thousand, seven hundred twenty-two".