6315745433681 has 2 divisors, whose sum is σ = 6315745433682. Its totient is φ = 6315745433680.

The previous prime is 6315745433659. The next prime is 6315745433689. The reversal of 6315745433681 is 1863345475136.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6315244390225 + 501043456 = 2513015^2 + 22384^2 .

It is a cyclic number.

It is not a de Polignac number, because 6315745433681 - 2⁶ = 6315745433617 is a prime.

It is a super-2 number, since 2×6315745433681² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6315745433689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3157872716840 + 3157872716841.

It is an arithmetic number, because the mean of its divisors is an integer number (3157872716841).

Almost surely, 2^{6315745433681} is an apocalyptic number.

It is an amenable number.

6315745433681 is a deficient number, since it is larger than the sum of its proper divisors (1).

6315745433681 is an equidigital number, since it uses as much as digits as its factorization.

6315745433681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21772800, while the sum is 56.

The spelling of 6315745433681 in words is "six trillion, three hundred fifteen billion, seven hundred forty-five million, four hundred thirty-three thousand, six hundred eighty-one".