256506403526346 has 64 divisors (see below), whose sum is σ = 548582690448000. Its totient is φ = 79677135722496.

The previous prime is 256506403526327. The next prime is 256506403526419. The reversal of 256506403526346 is 643625304605652.

It is a super-2 number, since 2×256506403526346² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22204116 + ... + 31718063.

It is an arithmetic number, because the mean of its divisors is an integer number (8571604538250).

Almost surely, 2^{256506403526346} is an apocalyptic number.

256506403526346 is an abundant number, since it is smaller than the sum of its proper divisors (292076286921654).

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

256506403526346 is a wasteful number, since it uses less digits than its factorization.

256506403526346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53922663.

The product of its (nonzero) digits is 93312000, while the sum is 57.

The spelling of 256506403526346 in words is "two hundred fifty-six trillion, five hundred six billion, four hundred three million, five hundred twenty-six thousand, three hundred forty-six".