255856907329 has 3 divisors (see below), whose sum is σ = 255857413153. Its totient is φ = 255856401506.

The previous prime is 255856907311. The next prime is 255856907351. The reversal of 255856907329 is 923709658552.

The square root of 255856907329 is 505823.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 255856907329 - 2⁵ = 255856907297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255856901329) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 252912 + ... + 758734.

Almost surely, 2^255856907329 is an apocalyptic number.

255856907329 is the 505823-rd square number.

255856907329 is the 252912-nd centered octagonal number.

It is an amenable number.

255856907329 is a deficient number, since it is larger than the sum of its proper divisors (505824).

255856907329 is an frugal number, since it uses more digits than its factorization.

255856907329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1011646 (or 505823 counting only the distinct ones).

The product of its (nonzero) digits is 40824000, while the sum is 61.

The spelling of 255856907329 in words is "two hundred fifty-five billion, eight hundred fifty-six million, nine hundred seven thousand, three hundred twenty-nine".