256347000525 has 96 divisors (see below), whose sum is σ = 559490761728. Its totient is φ = 100267084800.

The previous prime is 256347000523. The next prime is 256347000577. The reversal of 256347000525 is 525000743652.

It is a happy number.

It is not a de Polignac number, because 256347000525 - 2¹ = 256347000523 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256347000521) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1207387 + ... + 1403736.

It is an arithmetic number, because the mean of its divisors is an integer number (5828028768).

Almost surely, 2^256347000525 is an apocalyptic number.

256347000525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

256347000525 is an abundant number, since it is smaller than the sum of its proper divisors (303143761203).

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

256347000525 is a wasteful number, since it uses less digits than its factorization.

256347000525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2611171 (or 2611166 counting only the distinct ones).

The product of its (nonzero) digits is 252000, while the sum is 39.

The spelling of 256347000525 in words is "two hundred fifty-six billion, three hundred forty-seven million, five hundred twenty-five", and thus it is an aban number.