647373681244 has 6 divisors (see below), whose sum is σ = 1132903942184. Its totient is φ = 323686840620.

The previous prime is 647373681211. The next prime is 647373681271. The reversal of 647373681244 is 442186373746.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80921710152 + ... + 80921710159.

Almost surely, 2^647373681244 is an apocalyptic number.

It is an amenable number.

647373681244 is a deficient number, since it is larger than the sum of its proper divisors (485530260940).

647373681244 is a wasteful number, since it uses less digits than its factorization.

647373681244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161843420315 (or 161843420313 counting only the distinct ones).

The product of its digits is 16257024, while the sum is 55.

The spelling of 647373681244 in words is "six hundred forty-seven billion, three hundred seventy-three million, six hundred eighty-one thousand, two hundred forty-four".