256040521633 has 16 divisors (see below), whose sum is σ = 276150079296. Its totient is φ = 235990370880.

The previous prime is 256040521549. The next prime is 256040521643. The reversal of 256040521633 is 336125040652.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256040521633 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 256040521592 and 256040521601.

It is not an unprimeable number, because it can be changed into a prime (256040521643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47037610 + ... + 47043052.

It is an arithmetic number, because the mean of its divisors is an integer number (17259379956).

Almost surely, 2^256040521633 is an apocalyptic number.

It is an amenable number.

256040521633 is a deficient number, since it is larger than the sum of its proper divisors (20109557663).

256040521633 is a wasteful number, since it uses less digits than its factorization.

256040521633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10224.

The product of its (nonzero) digits is 129600, while the sum is 37.

The spelling of 256040521633 in words is "two hundred fifty-six billion, forty million, five hundred twenty-one thousand, six hundred thirty-three".