6541895418836 has 6 divisors (see below), whose sum is σ = 11448316982970. Its totient is φ = 3270947709416.

The previous prime is 6541895418827. The next prime is 6541895418847. The reversal of 6541895418836 is 6388145981456.

It can be written as a sum of positive squares in only one way, i.e., 6396700888900 + 145194529936 = 2529170^2 + 381044^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 817736927351 + ... + 817736927358.

It is an arithmetic number, because the mean of its divisors is an integer number (1908052830495).

Almost surely, 2^{6541895418836} is an apocalyptic number.

It is an amenable number.

6541895418836 is a deficient number, since it is larger than the sum of its proper divisors (4906421564134).

6541895418836 is a wasteful number, since it uses less digits than its factorization.

6541895418836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1635473854713 (or 1635473854711 counting only the distinct ones).

The product of its digits is 199065600, while the sum is 68.

The spelling of 6541895418836 in words is "six trillion, five hundred forty-one billion, eight hundred ninety-five million, four hundred eighteen thousand, eight hundred thirty-six".