256763073347749 has 4 divisors (see below), whose sum is σ = 270276919313440. Its totient is φ = 243249227382060.

The previous prime is 256763073347719. The next prime is 256763073347779. The reversal of 256763073347749 is 947743370367652.

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 an interprime number because it is at equal distance from previous prime (256763073347719) and next prime (256763073347779).

It is a cyclic number.

It is not a de Polignac number, because 256763073347749 - 2⁵ = 256763073347717 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 (256763073347719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6756922982817 + ... + 6756922982854.

It is an arithmetic number, because the mean of its divisors is an integer number (67569229828360).

Almost surely, 2^{256763073347749} is an apocalyptic number.

It is an amenable number.

256763073347749 is a deficient number, since it is larger than the sum of its proper divisors (13513845965691).

256763073347749 is a wasteful number, since it uses less digits than its factorization.

256763073347749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13513845965690.

The product of its (nonzero) digits is 3360631680, while the sum is 73.

The spelling of 256763073347749 in words is "two hundred fifty-six trillion, seven hundred sixty-three billion, seventy-three million, three hundred forty-seven thousand, seven hundred forty-nine".