255663344015 has 4 divisors (see below), whose sum is σ = 306796012824. Its totient is φ = 204530675208.

The previous prime is 255663344011. The next prime is 255663344023. The reversal of 255663344015 is 510443366552.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 255663344015 - 2² = 255663344011 is a prime.

It is a super-3 number, since 3×255663344015³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255663344011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25566334397 + ... + 25566334406.

It is an arithmetic number, because the mean of its divisors is an integer number (76699003206).

Almost surely, 2^255663344015 is an apocalyptic number.

255663344015 is a deficient number, since it is larger than the sum of its proper divisors (51132668809).

255663344015 is an equidigital number, since it uses as much as digits as its factorization.

255663344015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51132668808.

The product of its (nonzero) digits is 1296000, while the sum is 44.

The spelling of 255663344015 in words is "two hundred fifty-five billion, six hundred sixty-three million, three hundred forty-four thousand, fifteen".