6256945075691 has 4 divisors (see below), whose sum is σ = 6256953936312. Its totient is φ = 6256936215072.

The previous prime is 6256945075597. The next prime is 6256945075697. The reversal of 6256945075691 is 1965705496526.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6256945075691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6256945075697) 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, 3269741 + ... + 4817166.

It is an arithmetic number, because the mean of its divisors is an integer number (1564238484078).

Almost surely, 2^{6256945075691} is an apocalyptic number.

6256945075691 is a deficient number, since it is larger than the sum of its proper divisors (8860621).

6256945075691 is an equidigital number, since it uses as much as digits as its factorization.

6256945075691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8860620.

The product of its (nonzero) digits is 122472000, while the sum is 65.

The spelling of 6256945075691 in words is "six trillion, two hundred fifty-six billion, nine hundred forty-five million, seventy-five thousand, six hundred ninety-one".