256163646361652 has 24 divisors (see below), whose sum is σ = 449276724220800. Its totient is φ = 127798895258496.

The previous prime is 256163646361633. The next prime is 256163646361697.

It is a happy number.

256163646361652 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34328099 + ... + 41118677.

It is an arithmetic number, because the mean of its divisors is an integer number (18719863509200).

Almost surely, 2^{256163646361652} is an apocalyptic number.

It is an amenable number.

256163646361652 is a deficient number, since it is larger than the sum of its proper divisors (193113077859148).

256163646361652 is a wasteful number, since it uses less digits than its factorization.

256163646361652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6811415 (or 6811413 counting only the distinct ones).

The product of its digits is 167961600, while the sum is 62.

The spelling of 256163646361652 in words is "two hundred fifty-six trillion, one hundred sixty-three billion, six hundred forty-six million, three hundred sixty-one thousand, six hundred fifty-two".