6453899653 has 2 divisors, whose sum is σ = 6453899654. Its totient is φ = 6453899652.

The previous prime is 6453899587. The next prime is 6453899663. The reversal of 6453899653 is 3569983546.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5144762529 + 1309137124 = 71727^2 + 36182^2 .

It is a cyclic number.

It is not a de Polignac number, because 6453899653 - 2²¹ = 6451802501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6453899663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3226949826 + 3226949827.

It is an arithmetic number, because the mean of its divisors is an integer number (3226949827).

Almost surely, 2^6453899653 is an apocalyptic number.

It is an amenable number.

6453899653 is a deficient number, since it is larger than the sum of its proper divisors (1).

6453899653 is an equidigital number, since it uses as much as digits as its factorization.

6453899653 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20995200, while the sum is 58.

The square root of 6453899653 is about 80336.1665316438. The cubic root of 6453899653 is about 1861.8330536827.

The spelling of 6453899653 in words is "six billion, four hundred fifty-three million, eight hundred ninety-nine thousand, six hundred fifty-three".