255694394238 has 8 divisors (see below), whose sum is σ = 511388788488. Its totient is φ = 85231464744.

The previous prime is 255694394213. The next prime is 255694394273. The reversal of 255694394238 is 832493496552.

255694394238 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

255694394238 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21307866181 + ... + 21307866192.

It is an arithmetic number, because the mean of its divisors is an integer number (63923598561).

Almost surely, 2^255694394238 is an apocalyptic number.

255694394238 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

255694394238 is a wasteful number, since it uses less digits than its factorization.

255694394238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42615732378.

The product of its digits is 55987200, while the sum is 60.

The spelling of 255694394238 in words is "two hundred fifty-five billion, six hundred ninety-four million, three hundred ninety-four thousand, two hundred thirty-eight".