1650650560561 has 4 divisors (see below), whose sum is σ = 1653818796324. Its totient is φ = 1647482324800.

The previous prime is 1650650560487. The next prime is 1650650560597.

1650650560561 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1027547142400 + 623103418161 = 1013680^2 + 789369^2 .

It is a cyclic number.

It is not a de Polignac number, because 1650650560561 - 2²⁷ = 1650516342833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1650650560661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1584117100 + ... + 1584118141.

It is an arithmetic number, because the mean of its divisors is an integer number (413454699081).

Almost surely, 2^{1650650560561} is an apocalyptic number.

It is an amenable number.

1650650560561 is a deficient number, since it is larger than the sum of its proper divisors (3168235763).

1650650560561 is an equidigital number, since it uses as much as digits as its factorization.

1650650560561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3168235762.

The product of its (nonzero) digits is 810000, while the sum is 46.

The spelling of 1650650560561 in words is "one trillion, six hundred fifty billion, six hundred fifty million, five hundred sixty thousand, five hundred sixty-one".