256390245706 has 12 divisors (see below), whose sum is σ = 447374816658. Its totient is φ = 109881533832.

The previous prime is 256390245689. The next prime is 256390245719. The reversal of 256390245706 is 607542093652.

256390245706 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 241577165025 + 14813080681 = 491505^2 + 121709^2 .

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a self number, because there is not a number n which added to its sum of digits gives 256390245706.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1308113401 + ... + 1308113596.

Almost surely, 2^256390245706 is an apocalyptic number.

256390245706 is a deficient number, since it is larger than the sum of its proper divisors (190984570952).

256390245706 is a wasteful number, since it uses less digits than its factorization.

256390245706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2616227013 (or 2616227006 counting only the distinct ones).

The product of its (nonzero) digits is 2721600, while the sum is 49.

The spelling of 256390245706 in words is "two hundred fifty-six billion, three hundred ninety million, two hundred forty-five thousand, seven hundred six".