256117624803 has 12 divisors (see below), whose sum is σ = 369952238448. Its totient is φ = 170742979440.

The previous prime is 256117624801. The next prime is 256117624811. The reversal of 256117624803 is 308426711652.

256117624803 is a `hidden beast` number, since 2 + 5 + 6 + 1 + 17 + 624 + 8 + 0 + 3 = 666.

It is not a de Polignac number, because 256117624803 - 2¹ = 256117624801 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (256117624801) 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 11 ways as a sum of consecutive naturals, for example, 1036801 + ... + 1259837.

It is an arithmetic number, because the mean of its divisors is an integer number (30829353204).

Almost surely, 2^256117624803 is an apocalyptic number.

256117624803 is a deficient number, since it is larger than the sum of its proper divisors (113834613645).

256117624803 is a wasteful number, since it uses less digits than its factorization.

256117624803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350634 (or 350631 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The spelling of 256117624803 in words is "two hundred fifty-six billion, one hundred seventeen million, six hundred twenty-four thousand, eight hundred three".