1650394944 has 168 divisors, whose sum is σ = 5213725920. Its totient is φ = 494976000.

The previous prime is 1650394943. The next prime is 1650394961. The reversal of 1650394944 is 4494930561.

1650394944 is a `hidden beast` number, since 16 + 503 + 94 + 9 + 44 = 666.

1650394944 is nontrivially palindromic in base 15.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1650394944.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1650394943) by changing a digit.

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, 638647 + ... + 641225.

Almost surely, 2^1650394944 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 1650394944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2606862960).

1650394944 is an abundant number, since it is smaller than the sum of its proper divisors (3563330976).

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

1650394944 is a wasteful number, since it uses less digits than its factorization.

1650394944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2709 (or 2696 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 45.

The square root of 1650394944 is about 40625.0531568883. The cubic root of 1650394944 is about 1181.7600241175.

The spelling of 1650394944 in words is "one billion, six hundred fifty million, three hundred ninety-four thousand, nine hundred forty-four".