6437557349 has 2 divisors, whose sum is σ = 6437557350. Its totient is φ = 6437557348.

The previous prime is 6437557339. The next prime is 6437557361. The reversal of 6437557349 is 9437557346.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5037450625 + 1400106724 = 70975^2 + 37418^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6437557349 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6437557349.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6437557339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3218778674 + 3218778675.

It is an arithmetic number, because the mean of its divisors is an integer number (3218778675).

Almost surely, 2^6437557349 is an apocalyptic number.

It is an amenable number.

6437557349 is a deficient number, since it is larger than the sum of its proper divisors (1).

6437557349 is an equidigital number, since it uses as much as digits as its factorization.

6437557349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9525600, while the sum is 53.

The square root of 6437557349 is about 80234.3900643608. The cubic root of 6437557349 is about 1860.2602392454.

The spelling of 6437557349 in words is "six billion, four hundred thirty-seven million, five hundred fifty-seven thousand, three hundred forty-nine".