255721546838 has 16 divisors (see below), whose sum is σ = 390847214736. Its totient is φ = 125439481440.

The previous prime is 255721546837. The next prime is 255721546841. The reversal of 255721546838 is 838645127552.

255721546838 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255721546837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1583045 + ... + 1737087.

It is an arithmetic number, because the mean of its divisors is an integer number (24427950921).

Almost surely, 2^255721546838 is an apocalyptic number.

255721546838 is a deficient number, since it is larger than the sum of its proper divisors (135125667898).

255721546838 is a wasteful number, since it uses less digits than its factorization.

255721546838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169759.

The product of its digits is 16128000, while the sum is 56.

The spelling of 255721546838 in words is "two hundred fifty-five billion, seven hundred twenty-one million, five hundred forty-six thousand, eight hundred thirty-eight".