255896765 has 4 divisors (see below), whose sum is σ = 307076124. Its totient is φ = 204717408.

The previous prime is 255896761. The next prime is 255896777. The reversal of 255896765 is 567698552.

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

It can be written as a sum of positive squares in 2 ways, for example, as 83210884 + 172685881 = 9122^2 + 13141^2 .

It is a cyclic number.

It is not a de Polignac number, because 255896765 - 2² = 255896761 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255896761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25589672 + ... + 25589681.

It is an arithmetic number, because the mean of its divisors is an integer number (76769031).

Almost surely, 2^255896765 is an apocalyptic number.

It is an amenable number.

255896765 is a deficient number, since it is larger than the sum of its proper divisors (51179359).

255896765 is an equidigital number, since it uses as much as digits as its factorization.

255896765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51179358.

The product of its digits is 4536000, while the sum is 53.

The square root of 255896765 is about 15996.7735809444. The cubic root of 255896765 is about 634.8750575681.

The spelling of 255896765 in words is "two hundred fifty-five million, eight hundred ninety-six thousand, seven hundred sixty-five".