2071021657164 has 12 divisors (see below), whose sum is σ = 4832383866744. Its totient is φ = 690340552384.

The previous prime is 2071021657123. The next prime is 2071021657231. The reversal of 2071021657164 is 4617561201702.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86292569037 + ... + 86292569060.

It is an arithmetic number, because the mean of its divisors is an integer number (402698655562).

Almost surely, 2^{2071021657164} is an apocalyptic number.

It is an amenable number.

2071021657164 is an abundant number, since it is smaller than the sum of its proper divisors (2761362209580).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2071021657164 is a wasteful number, since it uses less digits than its factorization.

2071021657164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172585138104 (or 172585138102 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 42.

Adding to 2071021657164 its reverse (4617561201702), we get a palindrome (6688582858866).

The spelling of 2071021657164 in words is "two trillion, seventy-one billion, twenty-one million, six hundred fifty-seven thousand, one hundred sixty-four".