647726106368 has 144 divisors (see below), whose sum is σ = 1460762096640. Its totient is φ = 283983667200.

The previous prime is 647726106359. The next prime is 647726106403. The reversal of 647726106368 is 863601627746.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26787788 + ... + 26811956.

Almost surely, 2^647726106368 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 647726106368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (730381048320).

647726106368 is an abundant number, since it is smaller than the sum of its proper divisors (813035990272).

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

647726106368 is a wasteful number, since it uses less digits than its factorization.

647726106368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24534 (or 24520 counting only the distinct ones).

The product of its (nonzero) digits is 12192768, while the sum is 56.

The spelling of 647726106368 in words is "six hundred forty-seven billion, seven hundred twenty-six million, one hundred six thousand, three hundred sixty-eight".