255850287640 has 32 divisors (see below), whose sum is σ = 609525686880. Its totient is φ = 96320108032.

The previous prime is 255850287629. The next prime is 255850287701. The reversal of 255850287640 is 46782058552.

255850287640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 188124532 + ... + 188125891.

It is an arithmetic number, because the mean of its divisors is an integer number (19047677715).

Almost surely, 2^255850287640 is an apocalyptic number.

255850287640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

255850287640 is an abundant number, since it is smaller than the sum of its proper divisors (353675399240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

255850287640 is a wasteful number, since it uses less digits than its factorization.

255850287640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376250451 (or 376250447 counting only the distinct ones).

The product of its (nonzero) digits is 5376000, while the sum is 52.

The spelling of 255850287640 in words is "two hundred fifty-five billion, eight hundred fifty million, two hundred eighty-seven thousand, six hundred forty".