256006675540 has 48 divisors (see below), whose sum is σ = 670272027264. Its totient is φ = 79794288000.

The previous prime is 256006675481. The next prime is 256006675559. The reversal of 256006675540 is 45576600652.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

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 15 ways as a sum of consecutive naturals, for example, 83117511 + ... + 83120590.

It is an arithmetic number, because the mean of its divisors is an integer number (13964000568).

Almost surely, 2^256006675540 is an apocalyptic number.

256006675540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256006675540 is an abundant number, since it is smaller than the sum of its proper divisors (414265351724).

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

256006675540 is a wasteful number, since it uses less digits than its factorization.

256006675540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166238128 (or 166238126 counting only the distinct ones).

The product of its (nonzero) digits is 1512000, while the sum is 46.

The spelling of 256006675540 in words is "two hundred fifty-six billion, six million, six hundred seventy-five thousand, five hundred forty".