6541953553 has 2 divisors, whose sum is σ = 6541953554. Its totient is φ = 6541953552.

The previous prime is 6541953527. The next prime is 6541953559. The reversal of 6541953553 is 3553591456.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6475742784 + 66210769 = 80472^2 + 8137^2 .

It is a cyclic number.

It is not a de Polignac number, because 6541953553 - 2⁵ = 6541953521 is a prime.

It is not a weakly prime, because it can be changed into another prime (6541953559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3270976776 + 3270976777.

It is an arithmetic number, because the mean of its divisors is an integer number (3270976777).

Almost surely, 2^6541953553 is an apocalyptic number.

It is an amenable number.

6541953553 is a deficient number, since it is larger than the sum of its proper divisors (1).

6541953553 is an equidigital number, since it uses as much as digits as its factorization.

6541953553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1215000, while the sum is 46.

The square root of 6541953553 is about 80882.3438891332. The cubic root of 6541953553 is about 1870.2621529011.

The spelling of 6541953553 in words is "six billion, five hundred forty-one million, nine hundred fifty-three thousand, five hundred fifty-three".