1256806840047 has 16 divisors (see below), whose sum is σ = 1872670060800. Its totient is φ = 743123038400.

The previous prime is 1256806840007. The next prime is 1256806840067. The reversal of 1256806840047 is 7400486086521.

It is a cyclic number.

It is not a de Polignac number, because 1256806840047 - 2¹⁰ = 1256806839023 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1256806840007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 464450547 + ... + 464453252.

It is an arithmetic number, because the mean of its divisors is an integer number (117041878800).

Almost surely, 2^{1256806840047} is an apocalyptic number.

1256806840047 is a deficient number, since it is larger than the sum of its proper divisors (615863220753).

1256806840047 is a wasteful number, since it uses less digits than its factorization.

1256806840047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 928903854.

The product of its (nonzero) digits is 2580480, while the sum is 51.

The spelling of 1256806840047 in words is "one trillion, two hundred fifty-six billion, eight hundred six million, eight hundred forty thousand, forty-seven".