1650005001 has 6 divisors (see below), whose sum is σ = 2383340570. Its totient is φ = 1100003328.

The previous prime is 1650004969. The next prime is 1650005003. The reversal of 1650005001 is 1005000561.

1650005001 is a `hidden beast` number, since 165 + 0 + 0 + 0 + 500 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1135622601 + 514382400 = 33699^2 + 22680^2 .

It is not a de Polignac number, because 1650005001 - 2⁵ = 1650004969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1650005003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 91666936 + ... + 91666953.

Almost surely, 2^1650005001 is an apocalyptic number.

It is an amenable number.

1650005001 is a deficient number, since it is larger than the sum of its proper divisors (733335569).

1650005001 is a wasteful number, since it uses less digits than its factorization.

1650005001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183333895 (or 183333892 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 18.

The square root of 1650005001 is about 40620.2535811878. The cubic root of 1650005001 is about 1181.6669443068. Note that the first 3 decimals are identical.

Adding to 1650005001 its reverse (1005000561), we get a palindrome (2655005562).

The spelling of 1650005001 in words is "one billion, six hundred fifty million, five thousand, one".