6957997649 has 2 divisors, whose sum is σ = 6957997650. Its totient is φ = 6957997648.

The previous prime is 6957997621. The next prime is 6957997681. The reversal of 6957997649 is 9467997596.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4765417024 + 2192580625 = 69032^2 + 46825^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6957997649 is a prime.

It is not a weakly prime, because it can be changed into another prime (6957997349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3478998824 + 3478998825.

It is an arithmetic number, because the mean of its divisors is an integer number (3478998825).

Almost surely, 2^6957997649 is an apocalyptic number.

It is an amenable number.

6957997649 is a deficient number, since it is larger than the sum of its proper divisors (1).

6957997649 is an equidigital number, since it uses as much as digits as its factorization.

6957997649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 231472080, while the sum is 71.

The square root of 6957997649 is about 83414.6129224370. The cubic root of 6957997649 is about 1909.0974280557.

The spelling of 6957997649 in words is "six billion, nine hundred fifty-seven million, nine hundred ninety-seven thousand, six hundred forty-nine".