256299237133 has 8 divisors (see below), whose sum is σ = 263233843808. Its totient is φ = 249365030544.

The previous prime is 256299237119. The next prime is 256299237163. The reversal of 256299237133 is 331732992652.

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 256299237133 - 2²¹ = 256297139981 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 (256299237113) 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, 1571110 + ... + 1726552.

It is an arithmetic number, because the mean of its divisors is an integer number (32904230476).

Almost surely, 2^256299237133 is an apocalyptic number.

It is an amenable number.

256299237133 is a deficient number, since it is larger than the sum of its proper divisors (6934606675).

256299237133 is a wasteful number, since it uses less digits than its factorization.

256299237133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200043.

The product of its digits is 3674160, while the sum is 52.

The spelling of 256299237133 in words is "two hundred fifty-six billion, two hundred ninety-nine million, two hundred thirty-seven thousand, one hundred thirty-three".