256673205016307 has 4 divisors (see below), whose sum is σ = 256673889337320. Its totient is φ = 256672520695296.

The previous prime is 256673205016297. The next prime is 256673205016387. The reversal of 256673205016307 is 703610502376652.

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

It is a cyclic number.

It is not a de Polignac number, because 256673205016307 - 2²⁰ = 256673203967731 is a prime.

It is a super-2 number, since 2×256673205016307² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256673205016387) 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, 341597582 + ... + 342348147.

It is an arithmetic number, because the mean of its divisors is an integer number (64168472334330).

Almost surely, 2^{256673205016307} is an apocalyptic number.

256673205016307 is a deficient number, since it is larger than the sum of its proper divisors (684321013).

256673205016307 is an equidigital number, since it uses as much as digits as its factorization.

256673205016307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684321012.

The product of its (nonzero) digits is 9525600, while the sum is 53.

The spelling of 256673205016307 in words is "two hundred fifty-six trillion, six hundred seventy-three billion, two hundred five million, sixteen thousand, three hundred seven".