8643490780 has 12 divisors (see below), whose sum is σ = 18151330680. Its totient is φ = 3457396304.

The previous prime is 8643490771. The next prime is 8643490799. The reversal of 8643490780 is 870943468.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 216087250 + ... + 216087289.

It is an arithmetic number, because the mean of its divisors is an integer number (1512610890).

Almost surely, 2^8643490780 is an apocalyptic number.

It is an amenable number.

8643490780 is an abundant number, since it is smaller than the sum of its proper divisors (9507839900).

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

8643490780 is a wasteful number, since it uses less digits than its factorization.

8643490780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432174548 (or 432174546 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 49.

The square root of 8643490780 is about 92970.3758193974. The cubic root of 8643490780 is about 2052.2474483324.

The spelling of 8643490780 in words is "eight billion, six hundred forty-three million, four hundred ninety thousand, seven hundred eighty".