256123261312350 has 48 divisors (see below), whose sum is σ = 642838527700992. Its totient is φ = 67476650366560.

The previous prime is 256123261312339. The next prime is 256123261312379. The reversal of 256123261312350 is 53213162321652.

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, 10286062302 + ... + 10286087201.

It is an arithmetic number, because the mean of its divisors is an integer number (13392469327104).

Almost surely, 2^{256123261312350} is an apocalyptic number.

256123261312350 is an abundant number, since it is smaller than the sum of its proper divisors (386715266388642).

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

256123261312350 is a wasteful number, since it uses less digits than its factorization.

256123261312350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20572149601 (or 20572149596 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 42.

The spelling of 256123261312350 in words is "two hundred fifty-six trillion, one hundred twenty-three billion, two hundred sixty-one million, three hundred twelve thousand, three hundred fifty".