256641437051703 has 12 divisors (see below), whose sum is σ = 404404688687688. Its totient is φ = 155540264879760.

The previous prime is 256641437051689. The next prime is 256641437051717. The reversal of 256641437051703 is 307150734146652.

256641437051703 is a `hidden beast` number, since 2 + 5 + 66 + 41 + 4 + 370 + 5 + 170 + 3 = 666.

It is an interprime number because it is at equal distance from previous prime (256641437051689) and next prime (256641437051717).

It is a de Polignac number, because none of the positive numbers 2^k-256641437051703 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 256641437051703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256641437051803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1296168873900 + ... + 1296168874097.

It is an arithmetic number, because the mean of its divisors is an integer number (33700390723974).

Almost surely, 2^{256641437051703} is an apocalyptic number.

256641437051703 is a deficient number, since it is larger than the sum of its proper divisors (147763251635985).

256641437051703 is a wasteful number, since it uses less digits than its factorization.

256641437051703 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2592337748014 (or 2592337748011 counting only the distinct ones).

The product of its (nonzero) digits is 12700800, while the sum is 54.

The spelling of 256641437051703 in words is "two hundred fifty-six trillion, six hundred forty-one billion, four hundred thirty-seven million, fifty-one thousand, seven hundred three".