255661440430 has 32 divisors (see below), whose sum is σ = 503218653408. Its totient is φ = 92746953600.

The previous prime is 255661440413. The next prime is 255661440479. The reversal of 255661440430 is 34044166552.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2714017 + ... + 2806636.

It is an arithmetic number, because the mean of its divisors is an integer number (15725582919).

Almost surely, 2^255661440430 is an apocalyptic number.

255661440430 is a deficient number, since it is larger than the sum of its proper divisors (247557212978).

255661440430 is a wasteful number, since it uses less digits than its factorization.

255661440430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5521092.

The product of its (nonzero) digits is 345600, while the sum is 40.

The spelling of 255661440430 in words is "two hundred fifty-five billion, six hundred sixty-one million, four hundred forty thousand, four hundred thirty".