256634483340 has 48 divisors (see below), whose sum is σ = 718599071232. Its totient is φ = 68433717696.

The previous prime is 256634483317. The next prime is 256634483353. The reversal of 256634483340 is 43384436652.

256634483340 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 2×256634483340² (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 256634483340.

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, 3102397 + ... + 3184043.

It is an arithmetic number, because the mean of its divisors is an integer number (14970813984).

Almost surely, 2^256634483340 is an apocalyptic number.

256634483340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256634483340 is an abundant number, since it is smaller than the sum of its proper divisors (461964587892).

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

256634483340 is a wasteful number, since it uses less digits than its factorization.

256634483340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134046 (or 134044 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 48.

The spelling of 256634483340 in words is "two hundred fifty-six billion, six hundred thirty-four million, four hundred eighty-three thousand, three hundred forty".