2165332120061 has 8 divisors (see below), whose sum is σ = 2372773234944. Its totient is φ = 1959656461920.

The previous prime is 2165332120027. The next prime is 2165332120073. The reversal of 2165332120061 is 1600212335612.

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 2165332120061 - 2⁶ = 2165332119997 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 (2165332120001) 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, 441361616 + ... + 441366521.

It is an arithmetic number, because the mean of its divisors is an integer number (296596654368).

Almost surely, 2^{2165332120061} is an apocalyptic number.

It is an amenable number.

2165332120061 is a deficient number, since it is larger than the sum of its proper divisors (207441114883).

2165332120061 is a wasteful number, since it uses less digits than its factorization.

2165332120061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 882728371.

The product of its (nonzero) digits is 12960, while the sum is 32.

Adding to 2165332120061 its reverse (1600212335612), we get a palindrome (3765544455673).

The spelling of 2165332120061 in words is "two trillion, one hundred sixty-five billion, three hundred thirty-two million, one hundred twenty thousand, sixty-one".