906447643922 has 18 divisors (see below), whose sum is σ = 1367673477429. Its totient is φ = 450572012320.

The previous prime is 906447643919. The next prime is 906447643939. The reversal of 906447643922 is 229346744609.

It can be written as a sum of positive squares in 2 ways, for example, as 903771547561 + 2676096361 = 950669^2 + 51731^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=673219.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 241010522 + ... + 241014282.

Almost surely, 2^906447643922 is an apocalyptic number.

906447643922 is a deficient number, since it is larger than the sum of its proper divisors (461225833507).

906447643922 is an frugal number, since it uses more digits than its factorization.

906447643922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7882 (or 3942 counting only the distinct ones).

The product of its (nonzero) digits is 15676416, while the sum is 56.

The spelling of 906447643922 in words is "nine hundred six billion, four hundred forty-seven million, six hundred forty-three thousand, nine hundred twenty-two".