256047642033 has 4 divisors (see below), whose sum is σ = 341396856048. Its totient is φ = 170698428020.

The previous prime is 256047642029. The next prime is 256047642079. The reversal of 256047642033 is 330246740652.

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 a cyclic number.

It is not a de Polignac number, because 256047642033 - 2² = 256047642029 is a prime.

It is not an unprimeable number, because it can be changed into a prime (256047642023) 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, 42674607003 + ... + 42674607008.

It is an arithmetic number, because the mean of its divisors is an integer number (85349214012).

Almost surely, 2^256047642033 is an apocalyptic number.

It is an amenable number.

256047642033 is a deficient number, since it is larger than the sum of its proper divisors (85349214015).

256047642033 is an equidigital number, since it uses as much as digits as its factorization.

256047642033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85349214014.

The product of its (nonzero) digits is 725760, while the sum is 42.

The spelling of 256047642033 in words is "two hundred fifty-six billion, forty-seven million, six hundred forty-two thousand, thirty-three".