2812689161 has 4 divisors (see below), whose sum is σ = 2844292500. Its totient is φ = 2781085824.

The previous prime is 2812689137. The next prime is 2812689181. The reversal of 2812689161 is 1619862182.

2812689161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 1653967561 + 1158721600 = 40669^2 + 34040^2 .

It is a cyclic number.

It is not a de Polignac number, because 2812689161 - 2³⁰ = 1738947337 is a prime.

It is a super-2 number, since 2×2812689161² = 15822440632813767842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2812689181) 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, 15801536 + ... + 15801713.

It is an arithmetic number, because the mean of its divisors is an integer number (711073125).

Almost surely, 2^2812689161 is an apocalyptic number.

It is an amenable number.

2812689161 is a deficient number, since it is larger than the sum of its proper divisors (31603339).

2812689161 is an equidigital number, since it uses as much as digits as its factorization.

2812689161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31603338.

The product of its digits is 82944, while the sum is 44.

The square root of 2812689161 is about 53034.7919860161. The cubic root of 2812689161 is about 1411.5856883572.

The spelling of 2812689161 in words is "two billion, eight hundred twelve million, six hundred eighty-nine thousand, one hundred sixty-one".