255905840564 has 24 divisors (see below), whose sum is σ = 488842491648. Its totient is φ = 116250603840.

The previous prime is 255905840551. The next prime is 255905840591. The reversal of 255905840564 is 465048509552.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1682084 + ... + 1827899.

It is an arithmetic number, because the mean of its divisors is an integer number (20368437152).

Almost surely, 2^255905840564 is an apocalyptic number.

It is an amenable number.

255905840564 is a deficient number, since it is larger than the sum of its proper divisors (232936651084).

255905840564 is a wasteful number, since it uses less digits than its factorization.

255905840564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3511655 (or 3511653 counting only the distinct ones).

The product of its (nonzero) digits is 8640000, while the sum is 53.

The spelling of 255905840564 in words is "two hundred fifty-five billion, nine hundred five million, eight hundred forty thousand, five hundred sixty-four".