2161305442433 has 8 divisors (see below), whose sum is σ = 2236353669480. Its totient is φ = 2086291912320.

The previous prime is 2161305442411. The next prime is 2161305442441. The reversal of 2161305442433 is 3342445031612.

It can be written as a sum of positive squares in 4 ways, for example, as 46773577984 + 2114531864449 = 216272^2 + 1454143^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2161305442433 - 2¹⁸ = 2161305180289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2161305442733) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8547458 + ... + 8796683.

It is an arithmetic number, because the mean of its divisors is an integer number (279544208685).

Almost surely, 2^{2161305442433} is an apocalyptic number.

It is an amenable number.

2161305442433 is a deficient number, since it is larger than the sum of its proper divisors (75048227047).

2161305442433 is a wasteful number, since it uses less digits than its factorization.

2161305442433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17348467.

The product of its (nonzero) digits is 207360, while the sum is 38.

The spelling of 2161305442433 in words is "two trillion, one hundred sixty-one billion, three hundred five million, four hundred forty-two thousand, four hundred thirty-three".