256724562533775 has 96 divisors (see below), whose sum is σ = 515882183093760. Its totient is φ = 110036751851520.

The previous prime is 256724562533753. The next prime is 256724562533839. The reversal of 256724562533775 is 577335265427652.

It is a happy number.

It is not a de Polignac number, because 256724562533775 - 2²¹ = 256724560436623 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 131696334 + ... + 133631483.

It is an arithmetic number, because the mean of its divisors is an integer number (5373772740560).

Almost surely, 2^{256724562533775} is an apocalyptic number.

256724562533775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

256724562533775 is an abundant number, since it is smaller than the sum of its proper divisors (259157620559985).

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

256724562533775 is a wasteful number, since it uses less digits than its factorization.

256724562533775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265327953 (or 265327948 counting only the distinct ones).

The product of its digits is 2222640000, while the sum is 69.

The spelling of 256724562533775 in words is "two hundred fifty-six trillion, seven hundred twenty-four billion, five hundred sixty-two million, five hundred thirty-three thousand, seven hundred seventy-five".