1022785664 has 32 divisors (see below), whose sum is σ = 2042118540. Its totient is φ = 510254080.

The previous prime is 1022785663. The next prime is 1022785667. The reversal of 1022785664 is 4665872201.

1022785664 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 2 ways, for example, as 888040000 + 134745664 = 29800^2 + 11608^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (1022785661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50342 + ... + 67674.

Almost surely, 2^1022785664 is an apocalyptic number.

It is an amenable number.

1022785664 is a deficient number, since it is larger than the sum of its proper divisors (1019332876).

1022785664 is an equidigital number, since it uses as much as digits as its factorization.

1022785664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17808 (or 17796 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 41.

The square root of 1022785664 is about 31981.0203714641. The cubic root of 1022785664 is about 1007.5382532830.

The spelling of 1022785664 in words is "one billion, twenty-two million, seven hundred eighty-five thousand, six hundred sixty-four".