256047653245 has 4 divisors (see below), whose sum is σ = 307257183900. Its totient is φ = 204838122592.

The previous prime is 256047653231. The next prime is 256047653333. The reversal of 256047653245 is 542356740652.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 165243063001 + 90804590244 = 406501^2 + 301338^2 .

It is a cyclic number.

It is not a de Polignac number, because 256047653245 - 2¹⁷ = 256047522173 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25604765320 + ... + 25604765329.

It is an arithmetic number, because the mean of its divisors is an integer number (76814295975).

Almost surely, 2^256047653245 is an apocalyptic number.

It is an amenable number.

256047653245 is a deficient number, since it is larger than the sum of its proper divisors (51209530655).

256047653245 is an equidigital number, since it uses as much as digits as its factorization.

256047653245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51209530654.

The product of its (nonzero) digits is 6048000, while the sum is 49.

The spelling of 256047653245 in words is "two hundred fifty-six billion, forty-seven million, six hundred fifty-three thousand, two hundred forty-five".