255645306117 has 8 divisors (see below), whose sum is σ = 378733786880. Its totient is φ = 170430204060.

The previous prime is 255645306113. The next prime is 255645306121. The reversal of 255645306117 is 711603546552.

255645306117 is a `hidden beast` number, since 2 + 5 + 56 + 4 + 530 + 61 + 1 + 7 = 666.

255645306117 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (255645306113) and next prime (255645306121).

It is not a de Polignac number, because 255645306117 - 2² = 255645306113 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255645306113) by changing a digit.

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, 4734172309 + ... + 4734172362.

It is an arithmetic number, because the mean of its divisors is an integer number (47341723360).

Almost surely, 2^255645306117 is an apocalyptic number.

255645306117 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

255645306117 is a deficient number, since it is larger than the sum of its proper divisors (123088480763).

255645306117 is an equidigital number, since it uses as much as digits as its factorization.

255645306117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9468344680 (or 9468344674 counting only the distinct ones).

The product of its (nonzero) digits is 756000, while the sum is 45.

The spelling of 255645306117 in words is "two hundred fifty-five billion, six hundred forty-five million, three hundred six thousand, one hundred seventeen".