255436785 has 24 divisors (see below), whose sum is σ = 458026920. Its totient is φ = 131534592.

The previous prime is 255436729. The next prime is 255436799. The reversal of 255436785 is 587634552.

255436785 is a `hidden beast` number, since 25 + 543 + 6 + 7 + 85 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 41370624 + 214066161 = 6432^2 + 14631^2 .

It is not a de Polignac number, because 255436785 - 2¹² = 255432689 is a prime.

It is a super-2 number, since 2×255436785² = 130495902262272450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 255436785.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 96564 + ... + 99173.

It is an arithmetic number, because the mean of its divisors is an integer number (19084455).

Almost surely, 2^255436785 is an apocalyptic number.

It is an amenable number.

255436785 is a deficient number, since it is larger than the sum of its proper divisors (202590135).

255436785 is a wasteful number, since it uses less digits than its factorization.

255436785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195777 (or 195774 counting only the distinct ones).

The product of its digits is 1008000, while the sum is 45.

The square root of 255436785 is about 15982.3898400709. The cubic root of 255436785 is about 634.4944288400.

The spelling of 255436785 in words is "two hundred fifty-five million, four hundred thirty-six thousand, seven hundred eighty-five".