619810816 has 39 divisors (see below), whose sum is σ = 1242664801. Its totient is φ = 309108736.

The previous prime is 619810801. The next prime is 619810819. The reversal of 619810816 is 618018916.

The square root of 619810816 is 24896.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 146313216 + 473497600 = 12096^2 + 21760^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (619810819) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1593150 + ... + 1593538.

Almost surely, 2^619810816 is an apocalyptic number.

619810816 is the 24896-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 619810816

619810816 is an abundant number, since it is smaller than the sum of its proper divisors (622853985).

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

619810816 is an frugal number, since it uses more digits than its factorization.

619810816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 802 (or 391 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 40.

The cubic root of 619810816 is about 852.6151596364.

Multiplying 619810816 by its product of nonzero digits (20736), we get a square (12852397080576 = 3585024²).

The spelling of 619810816 in words is "six hundred nineteen million, eight hundred ten thousand, eight hundred sixteen".