255281953290 has 128 divisors (see below), whose sum is σ = 760737664512. Its totient is φ = 53384970240.

The previous prime is 255281953237. The next prime is 255281953291. The reversal of 255281953290 is 92359182552.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (255281953291) 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, 105271 + ... + 722250.

It is an arithmetic number, because the mean of its divisors is an integer number (5943263004).

Almost surely, 2^255281953290 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 255281953290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (380368832256).

255281953290 is an abundant number, since it is smaller than the sum of its proper divisors (505455711222).

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

255281953290 is a wasteful number, since it uses less digits than its factorization.

255281953290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 827664.

The product of its (nonzero) digits is 1944000, while the sum is 51.

The spelling of 255281953290 in words is "two hundred fifty-five billion, two hundred eighty-one million, nine hundred fifty-three thousand, two hundred ninety".