255694394240 has 256 divisors, whose sum is σ = 667635696000. Its totient is φ = 93259038720.

The previous prime is 255694394213. The next prime is 255694394273. The reversal of 255694394240 is 42493496552.

It is a happy number.

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, 66463997 + ... + 66467843.

Almost surely, 2^255694394240 is an apocalyptic number.

255694394240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 255694394240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (333817848000).

255694394240 is an abundant number, since it is smaller than the sum of its proper divisors (411941301760).

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

255694394240 is a wasteful number, since it uses less digits than its factorization.

255694394240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4073 (or 4061 counting only the distinct ones).

The product of its (nonzero) digits is 9331200, while the sum is 53.

The spelling of 255694394240 in words is "two hundred fifty-five billion, six hundred ninety-four million, three hundred ninety-four thousand, two hundred forty".