647373664372 has 6 divisors (see below), whose sum is σ = 1132903912658. Its totient is φ = 323686832184.

The previous prime is 647373664369. The next prime is 647373664409. The reversal of 647373664372 is 273466373746.

647373664372 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 630632927376 + 16740736996 = 794124^2 + 129386^2 .

It is a super-2 number, since 2×647373664372² (a number of 24 digits) contains 22 as substring.

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, 80921708043 + ... + 80921708050.

Almost surely, 2^647373664372 is an apocalyptic number.

It is an amenable number.

647373664372 is a deficient number, since it is larger than the sum of its proper divisors (485530248286).

647373664372 is a wasteful number, since it uses less digits than its factorization.

647373664372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161843416097 (or 161843416095 counting only the distinct ones).

The product of its digits is 64012032, while the sum is 58.

The spelling of 647373664372 in words is "six hundred forty-seven billion, three hundred seventy-three million, six hundred sixty-four thousand, three hundred seventy-two".