256551405266653 has 16 divisors (see below), whose sum is σ = 298759247462016. Its totient is φ = 215733682756800.

The previous prime is 256551405266633. The next prime is 256551405266677. The reversal of 256551405266653 is 356662504155652.

256551405266653 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256551405266653 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 256551405266591 and 256551405266600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256551405266633) 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, 25208251 + ... + 33890392.

It is an arithmetic number, because the mean of its divisors is an integer number (18672452966376).

Almost surely, 2^{256551405266653} is an apocalyptic number.

It is an amenable number.

256551405266653 is a deficient number, since it is larger than the sum of its proper divisors (42207842195363).

256551405266653 is a wasteful number, since it uses less digits than its factorization.

256551405266653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59110404.

The product of its (nonzero) digits is 194400000, while the sum is 61.

The spelling of 256551405266653 in words is "two hundred fifty-six trillion, five hundred fifty-one billion, four hundred five million, two hundred sixty-six thousand, six hundred fifty-three".