256551246348 has 12 divisors (see below), whose sum is σ = 598619574840. Its totient is φ = 85517082112.

The previous prime is 256551246337. The next prime is 256551246361. The reversal of 256551246348 is 843642155652.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 256551246348.

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, 10689635253 + ... + 10689635276.

It is an arithmetic number, because the mean of its divisors is an integer number (49884964570).

Almost surely, 2^256551246348 is an apocalyptic number.

It is an amenable number.

256551246348 is an abundant number, since it is smaller than the sum of its proper divisors (342068328492).

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

256551246348 is a wasteful number, since it uses less digits than its factorization.

256551246348 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21379270536 (or 21379270534 counting only the distinct ones).

The product of its digits is 6912000, while the sum is 51.

The spelling of 256551246348 in words is "two hundred fifty-six billion, five hundred fifty-one million, two hundred forty-six thousand, three hundred forty-eight".