256742103434 has 16 divisors (see below), whose sum is σ = 405393406080. Its totient is φ = 121611339360.

The previous prime is 256742103349. The next prime is 256742103437. The reversal of 256742103434 is 434301247652.

256742103434 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 256742103391 and 256742103400.

It is not an unprimeable number, because it can be changed into a prime (256742103437) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1821062 + ... + 1956974.

It is an arithmetic number, because the mean of its divisors is an integer number (25337087880).

Almost surely, 2^256742103434 is an apocalyptic number.

256742103434 is a deficient number, since it is larger than the sum of its proper divisors (148651302646).

256742103434 is a wasteful number, since it uses less digits than its factorization.

256742103434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185645.

The product of its (nonzero) digits is 483840, while the sum is 41.

The spelling of 256742103434 in words is "two hundred fifty-six billion, seven hundred forty-two million, one hundred three thousand, four hundred thirty-four".