646080620796 has 36 divisors (see below), whose sum is σ = 1758775024552. Its totient is φ = 198794037024.

The previous prime is 646080620791. The next prime is 646080620893. The reversal of 646080620796 is 697026080646.

646080620796 is a `hidden beast` number, since 6 + 4 + 6 + 0 + 8 + 0 + 620 + 7 + 9 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646080620791) 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, 690256606 + ... + 690257541.

Almost surely, 2^646080620796 is an apocalyptic number.

It is an amenable number.

646080620796 is an abundant number, since it is smaller than the sum of its proper divisors (1112694403756).

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

646080620796 is a wasteful number, since it uses less digits than its factorization.

646080620796 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1380514170 (or 1380514165 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 54.

The spelling of 646080620796 in words is "six hundred forty-six billion, eighty million, six hundred twenty thousand, seven hundred ninety-six".