255603575647 has 16 divisors (see below), whose sum is σ = 302528953600. Its totient is φ = 215818777944.

The previous prime is 255603575593. The next prime is 255603575651. The reversal of 255603575647 is 746575306552.

It is a de Polignac number, because none of the positive numbers 2^k-255603575647 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 (255603575677) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5538213 + ... + 5584174.

It is an arithmetic number, because the mean of its divisors is an integer number (18908059600).

Almost surely, 2^255603575647 is an apocalyptic number.

255603575647 is a deficient number, since it is larger than the sum of its proper divisors (46925377953).

255603575647 is an equidigital number, since it uses as much as digits as its factorization.

255603575647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11122475 (or 11122461 counting only the distinct ones).

The product of its (nonzero) digits is 26460000, while the sum is 55.

The spelling of 255603575647 in words is "two hundred fifty-five billion, six hundred three million, five hundred seventy-five thousand, six hundred forty-seven".