256724167770725 has 6 divisors (see below), whose sum is σ = 318337968035730. Its totient is φ = 205379334216560.

The previous prime is 256724167770701. The next prime is 256724167770727. The reversal of 256724167770725 is 527077761427652.

It can be written as a sum of positive squares in 3 ways, for example, as 3715156020676 + 253009011750049 = 1927474^2 + 15906257^2 .

It is not a de Polignac number, because 256724167770725 - 2¹⁰ = 256724167769701 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256724167770727) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 5134483355390 + ... + 5134483355439.

It is an arithmetic number, because the mean of its divisors is an integer number (53056328005955).

Almost surely, 2^{256724167770725} is an apocalyptic number.

256724167770725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

256724167770725 is a deficient number, since it is larger than the sum of its proper divisors (61613800265005).

256724167770725 is a wasteful number, since it uses less digits than its factorization.

256724167770725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10268966710839 (or 10268966710834 counting only the distinct ones).

The product of its (nonzero) digits is 484041600, while the sum is 68.

The spelling of 256724167770725 in words is "two hundred fifty-six trillion, seven hundred twenty-four billion, one hundred sixty-seven million, seven hundred seventy thousand, seven hundred twenty-five".