255894056247 has 4 divisors (see below), whose sum is σ = 341192075000. Its totient is φ = 170596037496.

The previous prime is 255894056219. The next prime is 255894056261. The reversal of 255894056247 is 742650498552.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 255894056247 - 2¹⁰ = 255894055223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255894056647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42649009372 + ... + 42649009377.

It is an arithmetic number, because the mean of its divisors is an integer number (85298018750).

Almost surely, 2^255894056247 is an apocalyptic number.

255894056247 is a deficient number, since it is larger than the sum of its proper divisors (85298018753).

255894056247 is an equidigital number, since it uses as much as digits as its factorization.

255894056247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85298018752.

The product of its (nonzero) digits is 24192000, while the sum is 57.

The spelling of 255894056247 in words is "two hundred fifty-five billion, eight hundred ninety-four million, fifty-six thousand, two hundred forty-seven".