256410634742 has 8 divisors (see below), whose sum is σ = 384724092096. Its totient is φ = 128169270712.

The previous prime is 256410634717. The next prime is 256410634757. The reversal of 256410634742 is 247436014652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 256410634693 and 256410634702.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 18014438 + ... + 18028665.

It is an arithmetic number, because the mean of its divisors is an integer number (48090511512).

Almost surely, 2^256410634742 is an apocalyptic number.

256410634742 is a deficient number, since it is larger than the sum of its proper divisors (128313457354).

256410634742 is a wasteful number, since it uses less digits than its factorization.

256410634742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36046662.

The product of its (nonzero) digits is 967680, while the sum is 44.

The spelling of 256410634742 in words is "two hundred fifty-six billion, four hundred ten million, six hundred thirty-four thousand, seven hundred forty-two".