6544067881 has 8 divisors (see below), whose sum is σ = 7049713664. Its totient is φ = 6038744400.

The previous prime is 6544067869. The next prime is 6544067897. The reversal of 6544067881 is 1887604456.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6544067881 - 2⁷ = 6544067753 is a prime.

It is a super-2 number, since 2×6544067881² = 85649648862271660322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6544067581) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37545 + ... + 120406.

It is an arithmetic number, because the mean of its divisors is an integer number (881214208).

Almost surely, 2^6544067881 is an apocalyptic number.

It is an amenable number.

6544067881 is a deficient number, since it is larger than the sum of its proper divisors (505645783).

6544067881 is a wasteful number, since it uses less digits than its factorization.

6544067881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161151.

The product of its (nonzero) digits is 1290240, while the sum is 49.

The square root of 6544067881 is about 80895.4132259673. The cubic root of 6544067881 is about 1870.4636177833.

The spelling of 6544067881 in words is "six billion, five hundred forty-four million, sixty-seven thousand, eight hundred eighty-one".