255753640 has 16 divisors (see below), whose sum is σ = 575445780. Its totient is φ = 102301440.

The previous prime is 255753607. The next prime is 255753643. The reversal of 255753640 is 46357552.

255753640 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 229886244 + 25867396 = 15162^2 + 5086^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 255753640.

It is not an unprimeable number, because it can be changed into a prime (255753643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3196881 + ... + 3196960.

Almost surely, 2^255753640 is an apocalyptic number.

255753640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

255753640 is an abundant number, since it is smaller than the sum of its proper divisors (319692140).

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

255753640 is a wasteful number, since it uses less digits than its factorization.

255753640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6393852 (or 6393848 counting only the distinct ones).

The product of its (nonzero) digits is 126000, while the sum is 37.

The square root of 255753640 is about 15992.2993968972. The cubic root of 255753640 is about 634.7566720170.

The spelling of 255753640 in words is "two hundred fifty-five million, seven hundred fifty-three thousand, six hundred forty".