2165354261053 has 4 divisors (see below), whose sum is σ = 2170808554300. Its totient is φ = 2159899967808.

The previous prime is 2165354261033. The next prime is 2165354261101. The reversal of 2165354261053 is 3501624535612.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 976266515844 + 1189087745209 = 988062^2 + 1090453^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2165354261053 is a prime.

It is a super-3 number, since 3×2165354261053³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2165354261023) 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 3 ways as a sum of consecutive naturals, for example, 2727146028 + ... + 2727146821.

It is an arithmetic number, because the mean of its divisors is an integer number (542702138575).

Almost surely, 2^{2165354261053} is an apocalyptic number.

It is an amenable number.

2165354261053 is a deficient number, since it is larger than the sum of its proper divisors (5454293247).

2165354261053 is an equidigital number, since it uses as much as digits as its factorization.

2165354261053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5454293246.

The product of its (nonzero) digits is 648000, while the sum is 43.

Adding to 2165354261053 its reverse (3501624535612), we get a palindrome (5666978796665).

The spelling of 2165354261053 in words is "two trillion, one hundred sixty-five billion, three hundred fifty-four million, two hundred sixty-one thousand, fifty-three".