647406907456 has 63 divisors (see below), whose sum is σ = 1315832150271. Its totient is φ = 316040290944.

The previous prime is 647406907387. The next prime is 647406907501. The reversal of 647406907456 is 654709604746.

The square root of 647406907456 is 804616.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 647406907456.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 276786735 + ... + 276789073.

Almost surely, 2^647406907456 is an apocalyptic number.

647406907456 is the 804616-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 647406907456

647406907456 is an abundant number, since it is smaller than the sum of its proper divisors (668425242815).

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

647406907456 is an frugal number, since it uses more digits than its factorization.

647406907456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4776 (or 2384 counting only the distinct ones).

The product of its (nonzero) digits is 30481920, while the sum is 58.

The spelling of 647406907456 in words is "six hundred forty-seven billion, four hundred six million, nine hundred seven thousand, four hundred fifty-six".