256406863001 has 4 divisors (see below), whose sum is σ = 256407881232. Its totient is φ = 256405844772.

The previous prime is 256406862991. The next prime is 256406863039. The reversal of 256406863001 is 100368604652.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 256406863001 - 2¹⁴ = 256406846617 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 256406863001.

It is not an unprimeable number, because it can be changed into a prime (256406868001) 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, 175310 + ... + 737256.

It is an arithmetic number, because the mean of its divisors is an integer number (64101970308).

Almost surely, 2^256406863001 is an apocalyptic number.

It is an amenable number.

256406863001 is a deficient number, since it is larger than the sum of its proper divisors (1018231).

256406863001 is an equidigital number, since it uses as much as digits as its factorization.

256406863001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1018230.

The product of its (nonzero) digits is 207360, while the sum is 41.

The spelling of 256406863001 in words is "two hundred fifty-six billion, four hundred six million, eight hundred sixty-three thousand, one".