647831901696 has 160 divisors (see below), whose sum is σ = 1973695342080. Its totient is φ = 184974852096.

The previous prime is 647831901679. The next prime is 647831901719. The reversal of 647831901696 is 696109138746.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17281245 + ... + 17318691.

It is an arithmetic number, because the mean of its divisors is an integer number (12335595888).

Almost surely, 2^647831901696 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 647831901696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (986847671040).

647831901696 is an abundant number, since it is smaller than the sum of its proper divisors (1325863440384).

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

647831901696 is a wasteful number, since it uses less digits than its factorization.

647831901696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39084 (or 39068 counting only the distinct ones).

The product of its (nonzero) digits is 11757312, while the sum is 60.

The spelling of 647831901696 in words is "six hundred forty-seven billion, eight hundred thirty-one million, nine hundred one thousand, six hundred ninety-six".