256634436652 has 24 divisors (see below), whose sum is σ = 490695770880. Its totient is φ = 116471706960.

The previous prime is 256634436637. The next prime is 256634436671.

256634436652 is nontrivially palindromic in base 10.

256634436652 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×256634436652² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 256634436652.

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 7 ways as a sum of consecutive naturals, for example, 4478952 + ... + 4535887.

It is an arithmetic number, because the mean of its divisors is an integer number (20445657120).

Almost surely, 2^256634436652 is an apocalyptic number.

256634436652 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

256634436652 is a deficient number, since it is larger than the sum of its proper divisors (234061334228).

256634436652 is a wasteful number, since it uses less digits than its factorization.

256634436652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9015501 (or 9015499 counting only the distinct ones).

The product of its digits is 18662400, while the sum is 52.

The spelling of 256634436652 in words is "two hundred fifty-six billion, six hundred thirty-four million, four hundred thirty-six thousand, six hundred fifty-two".