1650550561 has 16 divisors (see below), whose sum is σ = 1853273088. Its totient is φ = 1457240400.

The previous prime is 1650550543. The next prime is 1650550567.

1650550561 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1650550561 - 2⁵ = 1650550529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1650550567) 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 15 ways as a sum of consecutive naturals, for example, 36556 + ... + 68098.

It is an arithmetic number, because the mean of its divisors is an integer number (115829568).

Almost surely, 2^1650550561 is an apocalyptic number.

1650550561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1650550561 is a deficient number, since it is larger than the sum of its proper divisors (202722527).

1650550561 is a wasteful number, since it uses less digits than its factorization.

1650550561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31692.

The product of its (nonzero) digits is 22500, while the sum is 34.

The square root of 1650550561 is about 40626.9683953898. The cubic root of 1650550561 is about 1181.7971659686.

The spelling of 1650550561 in words is "one billion, six hundred fifty million, five hundred fifty thousand, five hundred sixty-one".