647633254416 has 20 divisors (see below), whose sum is σ = 1673052574032. Its totient is φ = 215877751456.

The previous prime is 647633254399. The next prime is 647633254553. The reversal of 647633254416 is 614452336746.

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, 6746179686 + ... + 6746179781.

Almost surely, 2^647633254416 is an apocalyptic number.

It is an amenable number.

647633254416 is an abundant number, since it is smaller than the sum of its proper divisors (1025419319616).

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

647633254416 is a wasteful number, since it uses less digits than its factorization.

647633254416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13492359478 (or 13492359472 counting only the distinct ones).

The product of its digits is 8709120, while the sum is 51.

The spelling of 647633254416 in words is "six hundred forty-seven billion, six hundred thirty-three million, two hundred fifty-four thousand, four hundred sixteen".