255970791 has 12 divisors (see below), whose sum is σ = 382485480. Its totient is φ = 164762640.

The previous prime is 255970783. The next prime is 255970801. The reversal of 255970791 is 197079552.

255970791 is a `hidden beast` number, since 2 + 559 + 7 + 0 + 7 + 91 = 666.

It is not a de Polignac number, because 255970791 - 2³ = 255970783 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255970391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 490105 + ... + 490626.

It is an arithmetic number, because the mean of its divisors is an integer number (31873790).

Almost surely, 2^255970791 is an apocalyptic number.

255970791 is a deficient number, since it is larger than the sum of its proper divisors (126514689).

255970791 is a wasteful number, since it uses less digits than its factorization.

255970791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 980766 (or 980763 counting only the distinct ones).

The product of its (nonzero) digits is 198450, while the sum is 45.

The square root of 255970791 is about 15999.0871927120. The cubic root of 255970791 is about 634.9362707035.

The spelling of 255970791 in words is "two hundred fifty-five million, nine hundred seventy thousand, seven hundred ninety-one".