646773696 has 84 divisors (see below), whose sum is σ = 1857361792. Its totient is φ = 215184384.

The previous prime is 646773691. The next prime is 646773761. The reversal of 646773696 is 696377646.

646773696 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 not an unprimeable number, because it can be changed into a prime (646773691) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 594465 + ... + 595551.

Almost surely, 2^646773696 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 646773696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (928680896).

646773696 is an abundant number, since it is smaller than the sum of its proper divisors (1210588096).

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

646773696 is a wasteful number, since it uses less digits than its factorization.

646773696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2138 (or 2125 counting only the distinct ones).

The product of its digits is 6858432, while the sum is 54.

The square root of 646773696 is about 25431.7458307526. The cubic root of 646773696 is about 864.8035220383.

The spelling of 646773696 in words is "six hundred forty-six million, seven hundred seventy-three thousand, six hundred ninety-six".