2163433465661 has 16 divisors (see below), whose sum is σ = 2358446890800. Its totient is φ = 1972653212160.

The previous prime is 2163433465631. The next prime is 2163433465667. The reversal of 2163433465661 is 1665643343612.

It can be written as a sum of positive squares in 8 ways, for example, as 743356076761 + 1420077388900 = 862181^2 + 1191670^2 .

It is a cyclic number.

It is not a de Polignac number, because 2163433465661 - 2⁶ = 2163433465597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2163433465667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2734760 + ... + 3435953.

It is an arithmetic number, because the mean of its divisors is an integer number (147402930675).

Almost surely, 2^{2163433465661} is an apocalyptic number.

It is an amenable number.

2163433465661 is a deficient number, since it is larger than the sum of its proper divisors (195013425139).

2163433465661 is a wasteful number, since it uses less digits than its factorization.

2163433465661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6171056.

The product of its digits is 5598720, while the sum is 50.

The spelling of 2163433465661 in words is "two trillion, one hundred sixty-three billion, four hundred thirty-three million, four hundred sixty-five thousand, six hundred sixty-one".