1650743640 has 384 divisors, whose sum is σ = 6769526400. Its totient is φ = 339517440.

The previous prime is 1650743621. The next prime is 1650743657. The reversal of 1650743640 is 463470561.

It is a happy number.

1650743640 is a `hidden beast` number, since 1 + 6 + 5 + 0 + 7 + 4 + 3 + 640 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1650743595 and 1650743604.

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 95 ways as a sum of consecutive naturals, for example, 1342546 + ... + 1343774.

It is an arithmetic number, because the mean of its divisors is an integer number (17628975).

Almost surely, 2^1650743640 is an apocalyptic number.

1650743640 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 1650743640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3384763200).

1650743640 is an abundant number, since it is smaller than the sum of its proper divisors (5118782760).

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

1650743640 is a wasteful number, since it uses less digits than its factorization.

1650743640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1307 (or 1300 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The square root of 1650743640 is about 40629.3445676890. The cubic root of 1650743640 is about 1181.8432458088.

The spelling of 1650743640 in words is "one billion, six hundred fifty million, seven hundred forty-three thousand, six hundred forty".