255257757648 has 160 divisors (see below), whose sum is σ = 777500236800. Its totient is φ = 80006914944.

The previous prime is 255257757611. The next prime is 255257757653. The reversal of 255257757648 is 846757752552.

255257757648 is a `hidden beast` number, since 2 + 5 + 5 + 2 + 57 + 7 + 576 + 4 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 368511 + ... + 803937.

It is an arithmetic number, because the mean of its divisors is an integer number (4859376480).

Almost surely, 2^255257757648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 255257757648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (388750118400).

255257757648 is an abundant number, since it is smaller than the sum of its proper divisors (522242479152).

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

255257757648 is a wasteful number, since it uses less digits than its factorization.

255257757648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435526 (or 435514 counting only the distinct ones).

The product of its digits is 164640000, while the sum is 63.

The spelling of 255257757648 in words is "two hundred fifty-five billion, two hundred fifty-seven million, seven hundred fifty-seven thousand, six hundred forty-eight".