6549894672 has 20 divisors (see below), whose sum is σ = 16920561360. Its totient is φ = 2183298208.

The previous prime is 6549894641. The next prime is 6549894679. The reversal of 6549894672 is 2764989456.

It is a super-2 number, since 2×6549894672² = 85802240428587975168, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6549894679) 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, 68228022 + ... + 68228117.

It is an arithmetic number, because the mean of its divisors is an integer number (846028068).

Almost surely, 2^6549894672 is an apocalyptic number.

It is an amenable number.

6549894672 is an abundant number, since it is smaller than the sum of its proper divisors (10370666688).

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

6549894672 is a wasteful number, since it uses less digits than its factorization.

6549894672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136456150 (or 136456144 counting only the distinct ones).

The product of its digits is 26127360, while the sum is 60.

The square root of 6549894672 is about 80931.4195600201. The cubic root of 6549894672 is about 1871.0186022177.

The spelling of 6549894672 in words is "six billion, five hundred forty-nine million, eight hundred ninety-four thousand, six hundred seventy-two".