2164201561277 has 8 divisors (see below), whose sum is σ = 2473424794176. Its totient is φ = 1854991223712.

The previous prime is 2164201561271. The next prime is 2164201561309. The reversal of 2164201561277 is 7721651024612.

It is a happy number.

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 2164201561277 - 2⁴ = 2164201561261 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2164201561271) 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, 2861483 + ... + 3537864.

It is an arithmetic number, because the mean of its divisors is an integer number (309178099272).

Almost surely, 2^{2164201561277} is an apocalyptic number.

It is an amenable number.

2164201561277 is a deficient number, since it is larger than the sum of its proper divisors (309223232899).

2164201561277 is an equidigital number, since it uses as much as digits as its factorization.

2164201561277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6447667.

The product of its (nonzero) digits is 282240, while the sum is 44.

Adding to 2164201561277 its reverse (7721651024612), we get a palindrome (9885852585889).

The spelling of 2164201561277 in words is "two trillion, one hundred sixty-four billion, two hundred one million, five hundred sixty-one thousand, two hundred seventy-seven".