6447364537 has 2 divisors, whose sum is σ = 6447364538. Its totient is φ = 6447364536.

The previous prime is 6447364457. The next prime is 6447364571. The reversal of 6447364537 is 7354637446.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6326452521 + 120912016 = 79539^2 + 10996^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6447364537 is a prime.

It is not a weakly prime, because it can be changed into another prime (6447364337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3223682268 + 3223682269.

It is an arithmetic number, because the mean of its divisors is an integer number (3223682269).

Almost surely, 2^6447364537 is an apocalyptic number.

It is an amenable number.

6447364537 is a deficient number, since it is larger than the sum of its proper divisors (1).

6447364537 is an equidigital number, since it uses as much as digits as its factorization.

6447364537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5080320, while the sum is 49.

The square root of 6447364537 is about 80295.4826687031. The cubic root of 6447364537 is about 1861.2044206212.

The spelling of 6447364537 in words is "six billion, four hundred forty-seven million, three hundred sixty-four thousand, five hundred thirty-seven".