255861391922 has 8 divisors (see below), whose sum is σ = 397026297900. Its totient is φ = 123519292624.

The previous prime is 255861391913. The next prime is 255861391987. The reversal of 255861391922 is 229193168552.

It can be written as a sum of positive squares in 2 ways, for example, as 220065130321 + 35796261601 = 469111^2 + 189199^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2205701597 + ... + 2205701712.

Almost surely, 2^255861391922 is an apocalyptic number.

255861391922 is a deficient number, since it is larger than the sum of its proper divisors (141164905978).

255861391922 is a wasteful number, since it uses less digits than its factorization.

255861391922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4411403340.

The product of its digits is 2332800, while the sum is 53.

The spelling of 255861391922 in words is "two hundred fifty-five billion, eight hundred sixty-one million, three hundred ninety-one thousand, nine hundred twenty-two".