255240644507 has 8 divisors (see below), whose sum is σ = 255958841376. Its totient is φ = 254523284992.

The previous prime is 255240644497. The next prime is 255240644509. The reversal of 255240644507 is 705446042552.

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

It is a cyclic number.

It is not a de Polignac number, because 255240644507 - 2³² = 250945677211 is a prime.

It is a super-4 number, since 4×255240644507⁴ (a number of 47 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255240644509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 403673 + ... + 820629.

It is an arithmetic number, because the mean of its divisors is an integer number (31994855172).

Almost surely, 2^255240644507 is an apocalyptic number.

255240644507 is a deficient number, since it is larger than the sum of its proper divisors (718196869).

255240644507 is a wasteful number, since it uses less digits than its factorization.

255240644507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418677.

The product of its (nonzero) digits is 1344000, while the sum is 44.

The spelling of 255240644507 in words is "two hundred fifty-five billion, two hundred forty million, six hundred forty-four thousand, five hundred seven".