255852780861 has 8 divisors (see below), whose sum is σ = 342904591360. Its totient is φ = 169684745472.

The previous prime is 255852780787. The next prime is 255852780881. The reversal of 255852780861 is 168087258552.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 255852780861 - 2³⁰ = 254779039037 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 (255852780881) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 220943101 + ... + 220944258.

It is an arithmetic number, because the mean of its divisors is an integer number (42863073920).

Almost surely, 2^255852780861 is an apocalyptic number.

It is an amenable number.

255852780861 is a deficient number, since it is larger than the sum of its proper divisors (87051810499).

255852780861 is a wasteful number, since it uses less digits than its factorization.

255852780861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441887555.

The product of its (nonzero) digits is 10752000, while the sum is 57.

The spelling of 255852780861 in words is "two hundred fifty-five billion, eight hundred fifty-two million, seven hundred eighty thousand, eight hundred sixty-one".