823745020816 has 15 divisors (see below), whose sum is σ = 1596013011793. Its totient is φ = 411870695200.

The previous prime is 823745020757. The next prime is 823745020873. The reversal of 823745020816 is 618020547328.

The square root of 823745020816 is 907604.

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

823745020816 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 44691651216 + 779053369600 = 211404^2 + 882640^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 3516966 + ... + 3743866.

Almost surely, 2^823745020816 is an apocalyptic number.

823745020816 is the 907604-th square number.

It is an amenable number.

823745020816 is a deficient number, since it is larger than the sum of its proper divisors (772267990977).

823745020816 is an frugal number, since it uses more digits than its factorization.

823745020816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453810 (or 226903 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 46.

The spelling of 823745020816 in words is "eight hundred twenty-three billion, seven hundred forty-five million, twenty thousand, eight hundred sixteen".