2166302156405 has 16 divisors (see below), whose sum is σ = 2648970745200. Its totient is φ = 1700249026560.

The previous prime is 2166302156393. The next prime is 2166302156407. The reversal of 2166302156405 is 5046512036612.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 95183973361 + 2071118183044 = 308519^2 + 1439138^2 .

It is not a de Polignac number, because 2166302156405 - 2¹² = 2166302152309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2166302156407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9010700 + ... + 9247989.

It is an arithmetic number, because the mean of its divisors is an integer number (165560671575).

Almost surely, 2^{2166302156405} is an apocalyptic number.

It is an amenable number.

2166302156405 is a deficient number, since it is larger than the sum of its proper divisors (482668588795).

2166302156405 is a wasteful number, since it uses less digits than its factorization.

2166302156405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18259144.

The product of its (nonzero) digits is 259200, while the sum is 41.

The spelling of 2166302156405 in words is "two trillion, one hundred sixty-six billion, three hundred two million, one hundred fifty-six thousand, four hundred five".