255540286385 has 4 divisors (see below), whose sum is σ = 306648343668. Its totient is φ = 204432229104.

The previous prime is 255540286369. The next prime is 255540286411. The reversal of 255540286385 is 583682045552.

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 95882503201 + 159657783184 = 309649^2 + 399572^2 .

It is a cyclic number.

It is not a de Polignac number, because 255540286385 - 2⁴ = 255540286369 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25554028634 + ... + 25554028643.

It is an arithmetic number, because the mean of its divisors is an integer number (76662085917).

Almost surely, 2^255540286385 is an apocalyptic number.

It is an amenable number.

255540286385 is a deficient number, since it is larger than the sum of its proper divisors (51108057283).

255540286385 is an equidigital number, since it uses as much as digits as its factorization.

255540286385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51108057282.

The product of its (nonzero) digits is 11520000, while the sum is 53.

The spelling of 255540286385 in words is "two hundred fifty-five billion, five hundred forty million, two hundred eighty-six thousand, three hundred eighty-five".