2165477541805 has 8 divisors (see below), whose sum is σ = 2598788896992. Its totient is φ = 1732238135568.

The previous prime is 2165477541791. The next prime is 2165477541809. The reversal of 2165477541805 is 5081457745612.

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 2165477541805 - 2¹⁵ = 2165477509037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2165477541809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17920999 + ... + 18041428.

It is an arithmetic number, because the mean of its divisors is an integer number (324848612124).

Almost surely, 2^{2165477541805} is an apocalyptic number.

It is an amenable number.

2165477541805 is a deficient number, since it is larger than the sum of its proper divisors (433311355187).

2165477541805 is a wasteful number, since it uses less digits than its factorization.

2165477541805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35974475.

The product of its (nonzero) digits is 9408000, while the sum is 55.

The spelling of 2165477541805 in words is "two trillion, one hundred sixty-five billion, four hundred seventy-seven million, five hundred forty-one thousand, eight hundred five".