255778743 has 32 divisors (see below), whose sum is σ = 384003072. Its totient is φ = 150076800.

The previous prime is 255778739. The next prime is 255778751. The reversal of 255778743 is 347877552.

It is not a de Polignac number, because 255778743 - 2² = 255778739 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 255778692 and 255778701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255778723) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 330505 + ... + 331277.

It is an arithmetic number, because the mean of its divisors is an integer number (12000096).

Almost surely, 2^255778743 is an apocalyptic number.

255778743 is a deficient number, since it is larger than the sum of its proper divisors (128224329).

255778743 is a wasteful number, since it uses less digits than its factorization.

255778743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1095.

The product of its digits is 1646400, while the sum is 48.

The square root of 255778743 is about 15993.0842241264. The cubic root of 255778743 is about 634.7774391055. Note that the first 3 decimals are identical.

The spelling of 255778743 in words is "two hundred fifty-five million, seven hundred seventy-eight thousand, seven hundred forty-three".