2165287679645 has 8 divisors (see below), whose sum is σ = 2735100227040. Its totient is φ = 1641060136080.

The previous prime is 2165287679603. The next prime is 2165287679651. The reversal of 2165287679645 is 5469767825612.

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

It is not a de Polignac number, because 2165287679645 - 2²² = 2165283485341 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11396250851 + ... + 11396251040.

It is an arithmetic number, because the mean of its divisors is an integer number (341887528380).

Almost surely, 2^{2165287679645} is an apocalyptic number.

It is an amenable number.

2165287679645 is a deficient number, since it is larger than the sum of its proper divisors (569812547395).

2165287679645 is a wasteful number, since it uses less digits than its factorization.

2165287679645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22792501915.

The product of its digits is 304819200, while the sum is 68.

The spelling of 2165287679645 in words is "two trillion, one hundred sixty-five billion, two hundred eighty-seven million, six hundred seventy-nine thousand, six hundred forty-five".