646761050740 has 96 divisors (see below), whose sum is σ = 1589042810880. Its totient is φ = 216509741184.

The previous prime is 646761050723. The next prime is 646761050777. The reversal of 646761050740 is 47050167646.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2639727 + ... + 2874313.

It is an arithmetic number, because the mean of its divisors is an integer number (16552529280).

Almost surely, 2^646761050740 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 646761050740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (794521405440).

646761050740 is an abundant number, since it is smaller than the sum of its proper divisors (942281760140).

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

646761050740 is a wasteful number, since it uses less digits than its factorization.

646761050740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235069 (or 235067 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 46.

The spelling of 646761050740 in words is "six hundred forty-six billion, seven hundred sixty-one million, fifty thousand, seven hundred forty".