255863787 has 16 divisors (see below), whose sum is σ = 364950432. Its totient is φ = 158883840.

The previous prime is 255863749. The next prime is 255863809. The reversal of 255863787 is 787368552.

It is not a de Polignac number, because 255863787 - 2⁷ = 255863659 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (255863887) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20914 + ... + 30807.

It is an arithmetic number, because the mean of its divisors is an integer number (22809402).

Almost surely, 2^255863787 is an apocalyptic number.

255863787 is a deficient number, since it is larger than the sum of its proper divisors (109086645).

255863787 is a wasteful number, since it uses less digits than its factorization.

255863787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51838.

The product of its digits is 2822400, while the sum is 51.

The square root of 255863787 is about 15995.7427773767. The cubic root of 255863787 is about 634.8477837974.

The spelling of 255863787 in words is "two hundred fifty-five million, eight hundred sixty-three thousand, seven hundred eighty-seven".