2161427718 has 16 divisors (see below), whose sum is σ = 4326433776. Its totient is φ = 719879520.

The previous prime is 2161427717. The next prime is 2161427731. The reversal of 2161427718 is 8177241612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2161427711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141213 + ... + 155768.

It is an arithmetic number, because the mean of its divisors is an integer number (270402111).

Almost surely, 2^2161427718 is an apocalyptic number.

2161427718 is an abundant number, since it is smaller than the sum of its proper divisors (2165006058).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2161427718 is a wasteful number, since it uses less digits than its factorization.

2161427718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298199.

The product of its digits is 37632, while the sum is 39.

The square root of 2161427718 is about 46491.1574172982. The cubic root of 2161427718 is about 1292.9455591790.

The spelling of 2161427718 in words is "two billion, one hundred sixty-one million, four hundred twenty-seven thousand, seven hundred eighteen".