647481022844 has 12 divisors (see below), whose sum is σ = 1135258317144. Its totient is φ = 323121503664.

The previous prime is 647481022807. The next prime is 647481022889. The reversal of 647481022844 is 448220184746.

It is a super-3 number, since 3×647481022844³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 647481022792 and 647481022801.

It is a congruent number.

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, 154749587 + ... + 154753770.

It is an arithmetic number, because the mean of its divisors is an integer number (94604859762).

Almost surely, 2^647481022844 is an apocalyptic number.

It is an amenable number.

647481022844 is a deficient number, since it is larger than the sum of its proper divisors (487777294300).

647481022844 is a wasteful number, since it uses less digits than its factorization.

647481022844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309503884 (or 309503882 counting only the distinct ones).

The product of its (nonzero) digits is 2752512, while the sum is 50.

The spelling of 647481022844 in words is "six hundred forty-seven billion, four hundred eighty-one million, twenty-two thousand, eight hundred forty-four".