2071964161 has 4 divisors (see below), whose sum is σ = 2079666900. Its totient is φ = 2064261424.

The previous prime is 2071964149. The next prime is 2071964173. The reversal of 2071964161 is 1614691702.

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

It is an interprime number because it is at equal distance from previous prime (2071964149) and next prime (2071964173).

It can be written as a sum of positive squares in 2 ways, for example, as 715883536 + 1356080625 = 26756^2 + 36825^2 .

It is a cyclic number.

It is not a de Polignac number, because 2071964161 - 2⁵ = 2071964129 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2071964161.

It is not an unprimeable number, because it can be changed into a prime (2071968161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3850966 + ... + 3851503.

It is an arithmetic number, because the mean of its divisors is an integer number (519916725).

Almost surely, 2^2071964161 is an apocalyptic number.

It is an amenable number.

2071964161 is a deficient number, since it is larger than the sum of its proper divisors (7702739).

2071964161 is an equidigital number, since it uses as much as digits as its factorization.

2071964161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7702738.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 2071964161 is about 45518.8330364477. The cubic root of 2071964161 is about 1274.8548671916.

The spelling of 2071964161 in words is "two billion, seventy-one million, nine hundred sixty-four thousand, one hundred sixty-one".