2161674677 has 2 divisors, whose sum is σ = 2161674678. Its totient is φ = 2161674676.

The previous prime is 2161674673. The next prime is 2161674689. The reversal of 2161674677 is 7764761612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2142393796 + 19280881 = 46286^2 + 4391^2 .

It is a cyclic number.

It is not a de Polignac number, because 2161674677 - 2² = 2161674673 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2161674673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1080837338 + 1080837339.

It is an arithmetic number, because the mean of its divisors is an integer number (1080837339).

Almost surely, 2^2161674677 is an apocalyptic number.

It is an amenable number.

2161674677 is a deficient number, since it is larger than the sum of its proper divisors (1).

2161674677 is an equidigital number, since it uses as much as digits as its factorization.

2161674677 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 592704, while the sum is 47.

The square root of 2161674677 is about 46493.8133196235. The cubic root of 2161674677 is about 1292.9948001474.

The spelling of 2161674677 in words is "two billion, one hundred sixty-one million, six hundred seventy-four thousand, six hundred seventy-seven".