256641095653 has 16 divisors (see below), whose sum is σ = 273488400000. Its totient is φ = 240145627392.

The previous prime is 256641095609. The next prime is 256641095657. The reversal of 256641095653 is 356590146652.

It is a cyclic number.

It is not a de Polignac number, because 256641095653 - 2⁹ = 256641095141 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 256641095653.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256641095657) 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, 270273 + ... + 765721.

It is an arithmetic number, because the mean of its divisors is an integer number (17093025000).

Almost surely, 2^256641095653 is an apocalyptic number.

It is an amenable number.

256641095653 is a deficient number, since it is larger than the sum of its proper divisors (16847304347).

256641095653 is a wasteful number, since it uses less digits than its factorization.

256641095653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495804.

The product of its (nonzero) digits is 5832000, while the sum is 52.

The spelling of 256641095653 in words is "two hundred fifty-six billion, six hundred forty-one million, ninety-five thousand, six hundred fifty-three".