1650794640 has 320 divisors, whose sum is σ = 6020186112. Its totient is φ = 370022400.

The previous prime is 1650794633. The next prime is 1650794647. The reversal of 1650794640 is 464970561.

It is an interprime number because it is at equal distance from previous prime (1650794633) and next prime (1650794647).

It is a junction number, because it is equal to n+sod(n) for n = 1650794592 and 1650794601.

It is not an unprimeable number, because it can be changed into a prime (1650794647) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1881882 + ... + 1882758.

Almost surely, 2^1650794640 is an apocalyptic number.

1650794640 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 1650794640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3010093056).

1650794640 is an abundant number, since it is smaller than the sum of its proper divisors (4369391472).

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

1650794640 is a wasteful number, since it uses less digits than its factorization.

1650794640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 958 (or 952 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 42.

The square root of 1650794640 is about 40629.9721880289. The cubic root of 1650794640 is about 1181.8554167648.

The spelling of 1650794640 in words is "one billion, six hundred fifty million, seven hundred ninety-four thousand, six hundred forty".