255664500 has 192 divisors, whose sum is σ = 916790784. Its totient is φ = 53913600.

The previous prime is 255664489. The next prime is 255664501. The reversal of 255664500 is 5466552.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255664501) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 135564 + ... + 137436.

It is an arithmetic number, because the mean of its divisors is an integer number (4774952).

Almost surely, 2^255664500 is an apocalyptic number.

255664500 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 255664500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (458395392).

255664500 is an abundant number, since it is smaller than the sum of its proper divisors (661126284).

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

255664500 is a wasteful number, since it uses less digits than its factorization.

255664500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1915 (or 1903 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 33.

The square root of 255664500 is about 15989.5121876810. The cubic root of 255664500 is about 634.6829177266.

The spelling of 255664500 in words is "two hundred fifty-five million, six hundred sixty-four thousand, five hundred".