2189846639161 has 4 divisors (see below), whose sum is σ = 2240773305232. Its totient is φ = 2138919973092.

The previous prime is 2189846639147. The next prime is 2189846639173. The reversal of 2189846639161 is 1619366489812.

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 2189846639161 - 2⁷ = 2189846639033 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2189846639093 and 2189846639102.

It is not an unprimeable number, because it can be changed into a prime (2189846679161) 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, 25463332971 + ... + 25463333056.

It is an arithmetic number, because the mean of its divisors is an integer number (560193326308).

Almost surely, 2^{2189846639161} is an apocalyptic number.

It is an amenable number.

2189846639161 is a deficient number, since it is larger than the sum of its proper divisors (50926666071).

2189846639161 is an equidigital number, since it uses as much as digits as its factorization.

2189846639161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50926666070.

The product of its digits is 26873856, while the sum is 64.

The spelling of 2189846639161 in words is "two trillion, one hundred eighty-nine billion, eight hundred forty-six million, six hundred thirty-nine thousand, one hundred sixty-one".