256743536421350 has 48 divisors (see below), whose sum is σ = 521389745567856. Its totient is φ = 93283549440000.

The previous prime is 256743536421329. The next prime is 256743536421377. The reversal of 256743536421350 is 53124635347652.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 193680179 + ... + 195001278.

It is an arithmetic number, because the mean of its divisors is an integer number (10862286365997).

Almost surely, 2^{256743536421350} is an apocalyptic number.

256743536421350 is an abundant number, since it is smaller than the sum of its proper divisors (264646209146506).

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

256743536421350 is a wasteful number, since it uses less digits than its factorization.

256743536421350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388682681 (or 388682676 counting only the distinct ones).

The product of its (nonzero) digits is 54432000, while the sum is 56.

The spelling of 256743536421350 in words is "two hundred fifty-six trillion, seven hundred forty-three billion, five hundred thirty-six million, four hundred twenty-one thousand, three hundred fifty".