2161438711 has 2 divisors, whose sum is σ = 2161438712. Its totient is φ = 2161438710.

The previous prime is 2161438673. The next prime is 2161438753. The reversal of 2161438711 is 1178341612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2161438711 - 2²¹ = 2159341559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2161438771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1080719355 + 1080719356.

It is an arithmetic number, because the mean of its divisors is an integer number (1080719356).

Almost surely, 2^2161438711 is an apocalyptic number.

2161438711 is a deficient number, since it is larger than the sum of its proper divisors (1).

2161438711 is an equidigital number, since it uses as much as digits as its factorization.

2161438711 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8064, while the sum is 34.

The square root of 2161438711 is about 46491.2756439313. The cubic root of 2161438711 is about 1292.9477511447.

The spelling of 2161438711 in words is "two billion, one hundred sixty-one million, four hundred thirty-eight thousand, seven hundred eleven".