256162286897 has 4 divisors (see below), whose sum is σ = 279449767536. Its totient is φ = 232874806260.

The previous prime is 256162286873. The next prime is 256162286921. The reversal of 256162286897 is 798682261652.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (256162286873) and next prime (256162286921).

It is a cyclic number.

It is not a de Polignac number, because 256162286897 - 2⁶ = 256162286833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256162286867) 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, 11643740303 + ... + 11643740324.

It is an arithmetic number, because the mean of its divisors is an integer number (69862441884).

Almost surely, 2^256162286897 is an apocalyptic number.

It is an amenable number.

256162286897 is a deficient number, since it is larger than the sum of its proper divisors (23287480639).

256162286897 is a wasteful number, since it uses less digits than its factorization.

256162286897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23287480638.

The product of its digits is 34836480, while the sum is 62.

The spelling of 256162286897 in words is "two hundred fifty-six billion, one hundred sixty-two million, two hundred eighty-six thousand, eight hundred ninety-seven".