256115428163 has 64 divisors (see below), whose sum is σ = 324311285760. Its totient is φ = 197347321728.

The previous prime is 256115428097. The next prime is 256115428171. The reversal of 256115428163 is 361824511652.

It is a cyclic number.

It is not a de Polignac number, because 256115428163 - 2³⁶ = 187395951427 is a prime.

It is a super-2 number, since 2×256115428163² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (256115428963) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 71003306 + ... + 71006912.

It is an arithmetic number, because the mean of its divisors is an integer number (5067363840).

Almost surely, 2^256115428163 is an apocalyptic number.

256115428163 is a deficient number, since it is larger than the sum of its proper divisors (68195857597).

256115428163 is a wasteful number, since it uses less digits than its factorization.

256115428163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4024.

The product of its digits is 345600, while the sum is 44.

The spelling of 256115428163 in words is "two hundred fifty-six billion, one hundred fifteen million, four hundred twenty-eight thousand, one hundred sixty-three".