256372393922 has 6 divisors (see below), whose sum is σ = 384559664979. Its totient is φ = 128185838930.

The previous prime is 256372393861. The next prime is 256372393961. The reversal of 256372393922 is 229393273652.

It can be written as a sum of positive squares in only one way, i.e., 128186196961 + 128186196961 = 358031^2 + 358031^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=358031.

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, 537047 + ... + 895077.

Almost surely, 2^256372393922 is an apocalyptic number.

256372393922 is a deficient number, since it is larger than the sum of its proper divisors (128187271057).

256372393922 is an frugal number, since it uses more digits than its factorization.

256372393922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 716064 (or 358033 counting only the distinct ones).

The product of its digits is 7348320, while the sum is 53.

The spelling of 256372393922 in words is "two hundred fifty-six billion, three hundred seventy-two million, three hundred ninety-three thousand, nine hundred twenty-two".