256660234525 has 24 divisors (see below), whose sum is σ = 318891375360. Its totient is φ = 204920432640.

The previous prime is 256660234403. The next prime is 256660234529. The reversal of 256660234525 is 525432066652.

It is a de Polignac number, because none of the positive numbers 2^k-256660234525 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256660234529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30394954 + ... + 30403396.

It is an arithmetic number, because the mean of its divisors is an integer number (13287140640).

Almost surely, 2^256660234525 is an apocalyptic number.

256660234525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

256660234525 is a deficient number, since it is larger than the sum of its proper divisors (62231140835).

256660234525 is a wasteful number, since it uses less digits than its factorization.

256660234525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10725 (or 10720 counting only the distinct ones).

The product of its (nonzero) digits is 2592000, while the sum is 46.

The spelling of 256660234525 in words is "two hundred fifty-six billion, six hundred sixty million, two hundred thirty-four thousand, five hundred twenty-five".