256541153153 has 4 divisors (see below), whose sum is σ = 256588308228. Its totient is φ = 256493998080.

The previous prime is 256541153137. The next prime is 256541153237. The reversal of 256541153153 is 351351145652.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 79824331024 + 176716822129 = 282532^2 + 420377^2 .

It is a cyclic number.

It is not a de Polignac number, because 256541153153 - 2⁴ = 256541153137 is a prime.

It is a super-2 number, since 2×256541153153² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 256541153153.

It is not an unprimeable number, because it can be changed into a prime (256541153653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23569376 + ... + 23580257.

It is an arithmetic number, because the mean of its divisors is an integer number (64147077057).

Almost surely, 2^256541153153 is an apocalyptic number.

It is an amenable number.

256541153153 is a deficient number, since it is larger than the sum of its proper divisors (47155075).

256541153153 is an equidigital number, since it uses as much as digits as its factorization.

256541153153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47155074.

The product of its digits is 270000, while the sum is 41.

The spelling of 256541153153 in words is "two hundred fifty-six billion, five hundred forty-one million, one hundred fifty-three thousand, one hundred fifty-three".