255005430440 has 32 divisors (see below), whose sum is σ = 575165097000. Its totient is φ = 101752771584.

The previous prime is 255005430431. The next prime is 255005430461. The reversal of 255005430440 is 44034500552.

It can be written as a sum of positive squares in 4 ways, for example, as 211373740516 + 43631689924 = 459754^2 + 208882^2 .

It is a junction number, because it is equal to n+sod(n) for n = 255005430397 and 255005430406.

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, 7777205 + ... + 7809924.

Almost surely, 2^255005430440 is an apocalyptic number.

255005430440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

255005430440 is an abundant number, since it is smaller than the sum of its proper divisors (320159666560).

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

255005430440 is a wasteful number, since it uses less digits than its factorization.

255005430440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15587549 (or 15587545 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 32.

Adding to 255005430440 its reverse (44034500552), we get a palindrome (299039930992).

The spelling of 255005430440 in words is "two hundred fifty-five billion, five million, four hundred thirty thousand, four hundred forty".