256632330642 has 32 divisors (see below), whose sum is σ = 515974536000. Its totient is φ = 85092641088.

The previous prime is 256632330613. The next prime is 256632330719. The reversal of 256632330642 is 246033236652.

It is a happy number.

256632330642 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 = 256632330594 and 256632330603.

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 15 ways as a sum of consecutive naturals, for example, 6681609 + ... + 6719907.

It is an arithmetic number, because the mean of its divisors is an integer number (16124204250).

Almost surely, 2^256632330642 is an apocalyptic number.

256632330642 is an abundant number, since it is smaller than the sum of its proper divisors (259342205358).

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

256632330642 is a wasteful number, since it uses less digits than its factorization.

256632330642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44170.

The product of its (nonzero) digits is 933120, while the sum is 42.

The spelling of 256632330642 in words is "two hundred fifty-six billion, six hundred thirty-two million, three hundred thirty thousand, six hundred forty-two".