6856641562751 has 2 divisors, whose sum is σ = 6856641562752. Its totient is φ = 6856641562750.

The previous prime is 6856641562739. The next prime is 6856641562781. The reversal of 6856641562751 is 1572651466586.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6856641562751 - 2¹⁴ = 6856641546367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6856641562781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3428320781375 + 3428320781376.

It is an arithmetic number, because the mean of its divisors is an integer number (3428320781376).

Almost surely, 2^{6856641562751} is an apocalyptic number.

6856641562751 is a deficient number, since it is larger than the sum of its proper divisors (1).

6856641562751 is an equidigital number, since it uses as much as digits as its factorization.

6856641562751 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576000, while the sum is 62.

The spelling of 6856641562751 in words is "six trillion, eight hundred fifty-six billion, six hundred forty-one million, five hundred sixty-two thousand, seven hundred fifty-one".