1650601620 has 72 divisors (see below), whose sum is σ = 5032872936. Its totient is φ = 437870592.

The previous prime is 1650601607. The next prime is 1650601627. The reversal of 1650601620 is 261060561.

It is a happy number.

1650601620 is a `hidden beast` number, since 1 + 6 + 50 + 601 + 6 + 2 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 2566404 + 1648035216 = 1602^2 + 40596^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1650601627) 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, 10984 + ... + 58496.

It is an arithmetic number, because the mean of its divisors is an integer number (69901013).

Almost surely, 2^1650601620 is an apocalyptic number.

1650601620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1650601620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2516436468).

1650601620 is an abundant number, since it is smaller than the sum of its proper divisors (3382271316).

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

1650601620 is a wasteful number, since it uses less digits than its factorization.

1650601620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47721 (or 47716 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 1650601620 is about 40627.5967785445. The cubic root of 1650601620 is about 1181.8093519548.

The spelling of 1650601620 in words is "one billion, six hundred fifty million, six hundred one thousand, six hundred twenty".