256385005183 has 8 divisors (see below), whose sum is σ = 262425374288. Its totient is φ = 250348178304.

The previous prime is 256385005133. The next prime is 256385005211. The reversal of 256385005183 is 381500583652.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 256385005183 - 2²¹ = 256382908031 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256385005133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 738810 + ... + 1028887.

It is an arithmetic number, because the mean of its divisors is an integer number (32803171786).

Almost surely, 2^256385005183 is an apocalyptic number.

256385005183 is a deficient number, since it is larger than the sum of its proper divisors (6040369105).

256385005183 is a wasteful number, since it uses less digits than its factorization.

256385005183 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1771113.

The product of its (nonzero) digits is 864000, while the sum is 46.

The spelling of 256385005183 in words is "two hundred fifty-six billion, three hundred eighty-five million, five thousand, one hundred eighty-three".