6541644164 has 12 divisors (see below), whose sum is σ = 12488593488. Its totient is φ = 2973474600.

The previous prime is 6541644163. The next prime is 6541644167. The reversal of 6541644164 is 4614461456.

It is not an unprimeable number, because it can be changed into a prime (6541644163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74336822 + ... + 74336909.

It is an arithmetic number, because the mean of its divisors is an integer number (1040716124).

Almost surely, 2^6541644164 is an apocalyptic number.

It is an amenable number.

6541644164 is a deficient number, since it is larger than the sum of its proper divisors (5946949324).

6541644164 is a wasteful number, since it uses less digits than its factorization.

6541644164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148673746 (or 148673744 counting only the distinct ones).

The product of its digits is 276480, while the sum is 41.

The square root of 6541644164 is about 80880.4312797601. The cubic root of 6541644164 is about 1870.2326689631.

The spelling of 6541644164 in words is "six billion, five hundred forty-one million, six hundred forty-four thousand, one hundred sixty-four".