2861129161 has 4 divisors (see below), whose sum is σ = 3121231824. Its totient is φ = 2601026500.

The previous prime is 2861129147. The next prime is 2861129179. The reversal of 2861129161 is 1619211682.

2861129161 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2861129161 - 2⁵ = 2861129129 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 2861129161.

It is not an unprimeable number, because it can be changed into a prime (2861129101) 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, 130051315 + ... + 130051336.

It is an arithmetic number, because the mean of its divisors is an integer number (780307956).

Almost surely, 2^2861129161 is an apocalyptic number.

It is an amenable number.

2861129161 is a deficient number, since it is larger than the sum of its proper divisors (260102663).

2861129161 is a wasteful number, since it uses less digits than its factorization.

2861129161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260102662.

The product of its digits is 10368, while the sum is 37.

The square root of 2861129161 is about 53489.5238434593. The cubic root of 2861129161 is about 1419.6430301866.

The spelling of 2861129161 in words is "two billion, eight hundred sixty-one million, one hundred twenty-nine thousand, one hundred sixty-one".