641020716 has 120 divisors (see below), whose sum is σ = 1933463840. Its totient is φ = 181398528.

The previous prime is 641020711. The next prime is 641020729. The reversal of 641020716 is 617020146.

641020716 is a `hidden beast` number, since 641 + 0 + 2 + 0 + 7 + 16 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 641020716.

It is not an unprimeable number, because it can be changed into a prime (641020711) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 245916 + ... + 248508.

Almost surely, 2^641020716 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 641020716, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (966731920).

641020716 is an abundant number, since it is smaller than the sum of its proper divisors (1292443124).

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

641020716 is a wasteful number, since it uses less digits than its factorization.

641020716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2725 (or 2714 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 641020716 is about 25318.3869154415. The cubic root of 641020716 is about 862.2317714127.

The spelling of 641020716 in words is "six hundred forty-one million, twenty thousand, seven hundred sixteen".