2164307380865 has 16 divisors (see below), whose sum is σ = 3028768348800. Its totient is φ = 1484096488560.

The previous prime is 2164307380783. The next prime is 2164307380889. The reversal of 2164307380865 is 5680837034612.

It is a happy number.

It is not a de Polignac number, because 2164307380865 - 2¹⁶ = 2164307315329 is a prime.

It is an unprimeable number.

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, 630991691 + ... + 630995120.

It is an arithmetic number, because the mean of its divisors is an integer number (189298021800).

Almost surely, 2^{2164307380865} is an apocalyptic number.

It is an amenable number.

2164307380865 is a deficient number, since it is larger than the sum of its proper divisors (864460967935).

2164307380865 is an equidigital number, since it uses as much as digits as its factorization.

2164307380865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1261986837 (or 1261986823 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 53.

The spelling of 2164307380865 in words is "two trillion, one hundred sixty-four billion, three hundred seven million, three hundred eighty thousand, eight hundred sixty-five".