256724653298636 has 6 divisors (see below), whose sum is σ = 449268143272620. Its totient is φ = 128362326649316.

The previous prime is 256724653298623. The next prime is 256724653298639. The reversal of 256724653298636 is 636892356427652.

It is a super-2 number, since 2×256724653298636² (a number of 30 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (256724653298639) by changing a digit.

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 as a sum of consecutive naturals, namely, 32090581662326 + ... + 32090581662333.

It is an arithmetic number, because the mean of its divisors is an integer number (74878023878770).

Almost surely, 2^{256724653298636} is an apocalyptic number.

It is an amenable number.

256724653298636 is a deficient number, since it is larger than the sum of its proper divisors (192543489973984).

256724653298636 is a wasteful number, since it uses less digits than its factorization.

256724653298636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64181163324663 (or 64181163324661 counting only the distinct ones).

The product of its digits is 4702924800, while the sum is 74.

The spelling of 256724653298636 in words is "two hundred fifty-six trillion, seven hundred twenty-four billion, six hundred fifty-three million, two hundred ninety-eight thousand, six hundred thirty-six".