1650664912 has 120 divisors (see below), whose sum is σ = 3706738200. Its totient is φ = 709263360.

The previous prime is 1650664903. The next prime is 1650664931. The reversal of 1650664912 is 2194660561.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 720170896 + 930494016 = 26836^2 + 30504^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6849112 + ... + 6849352.

It is an arithmetic number, because the mean of its divisors is an integer number (30889485).

Almost surely, 2^1650664912 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 1650664912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1853369100).

1650664912 is an abundant number, since it is smaller than the sum of its proper divisors (2056073288).

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

1650664912 is a wasteful number, since it uses less digits than its factorization.

1650664912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441 (or 422 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 1650664912 is about 40628.3756997496. The cubic root of 1650664912 is about 1181.8244571788.

It can be divided in two parts, 16506 and 64912, that added together give a palindrome (81418).

The spelling of 1650664912 in words is "one billion, six hundred fifty million, six hundred sixty-four thousand, nine hundred twelve".