2071021657165 has 8 divisors (see below), whose sum is σ = 2520229171968. Its totient is φ = 1633481870160.

The previous prime is 2071021657123. The next prime is 2071021657231. The reversal of 2071021657165 is 5617561201702.

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

It is not a de Polignac number, because 2071021657165 - 2³³ = 2062431722573 is a prime.

It is a Duffinian number.

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, 2916931557 + ... + 2916932266.

It is an arithmetic number, because the mean of its divisors is an integer number (315028646496).

Almost surely, 2^{2071021657165} is an apocalyptic number.

It is an amenable number.

2071021657165 is a deficient number, since it is larger than the sum of its proper divisors (449207514803).

2071021657165 is an equidigital number, since it uses as much as digits as its factorization.

2071021657165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5833863899.

The product of its (nonzero) digits is 176400, while the sum is 43.

Adding to 2071021657165 its reverse (5617561201702), we get a palindrome (7688582858867).

The spelling of 2071021657165 in words is "two trillion, seventy-one billion, twenty-one million, six hundred fifty-seven thousand, one hundred sixty-five".