256743500660106 has 16 divisors (see below), whose sum is σ = 526011074523648. Its totient is φ = 83493821352800.

The previous prime is 256743500660057. The next prime is 256743500660243. The reversal of 256743500660106 is 601066005347652.

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 7 ways as a sum of consecutive naturals, for example, 521836383210 + ... + 521836383701.

It is an arithmetic number, because the mean of its divisors is an integer number (32875692157728).

Almost surely, 2^{256743500660106} is an apocalyptic number.

256743500660106 is an abundant number, since it is smaller than the sum of its proper divisors (269267573863542).

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

256743500660106 is a wasteful number, since it uses less digits than its factorization.

256743500660106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1043672766957.

The product of its (nonzero) digits is 5443200, while the sum is 51.

The spelling of 256743500660106 in words is "two hundred fifty-six trillion, seven hundred forty-three billion, five hundred million, six hundred sixty thousand, one hundred six".