6551296644 has 12 divisors (see below), whose sum is σ = 15286358864. Its totient is φ = 2183765544.

The previous prime is 6551296621. The next prime is 6551296669. The reversal of 6551296644 is 4466921556.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 6551296593 and 6551296602.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 272970682 + ... + 272970705.

Almost surely, 2^6551296644 is an apocalyptic number.

It is an amenable number.

6551296644 is an abundant number, since it is smaller than the sum of its proper divisors (8735062220).

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

6551296644 is a wasteful number, since it uses less digits than its factorization.

6551296644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545941394 (or 545941392 counting only the distinct ones).

The product of its digits is 1555200, while the sum is 48.

The square root of 6551296644 is about 80940.0805781660. The cubic root of 6551296644 is about 1871.1520867336.

The spelling of 6551296644 in words is "six billion, five hundred fifty-one million, two hundred ninety-six thousand, six hundred forty-four".