6541216044 has 48 divisors (see below), whose sum is σ = 16670779776. Its totient is φ = 1979756800.

The previous prime is 6541216009. The next prime is 6541216061. The reversal of 6541216044 is 4406121456.

It is a super-3 number, since 3×6541216044³ (a number of 30 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 6541215996 and 6541216014.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79204 + ... + 139124.

It is an arithmetic number, because the mean of its divisors is an integer number (347307912).

Almost surely, 2^6541216044 is an apocalyptic number.

It is an amenable number.

6541216044 is an abundant number, since it is smaller than the sum of its proper divisors (10129563732).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6541216044 is a wasteful number, since it uses less digits than its factorization.

6541216044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60766 (or 60764 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 6541216044 is about 80877.7846135761. The cubic root of 6541216044 is about 1870.1918687474.

The spelling of 6541216044 in words is "six billion, five hundred forty-one million, two hundred sixteen thousand, forty-four".