647247430644 has 48 divisors (see below), whose sum is σ = 1519421597568. Its totient is φ = 214438795648.

The previous prime is 647247430633. The next prime is 647247430657. The reversal of 647247430644 is 446034742746.

It is a happy number.

647247430644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 7277854 + ... + 7366250.

It is an arithmetic number, because the mean of its divisors is an integer number (31654616616).

Almost surely, 2^647247430644 is an apocalyptic number.

It is an amenable number.

647247430644 is an abundant number, since it is smaller than the sum of its proper divisors (872174166924).

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

647247430644 is a wasteful number, since it uses less digits than its factorization.

647247430644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92104 (or 92102 counting only the distinct ones).

The product of its (nonzero) digits is 10838016, while the sum is 51.

The spelling of 647247430644 in words is "six hundred forty-seven billion, two hundred forty-seven million, four hundred thirty thousand, six hundred forty-four".