2165622366 has 32 divisors (see below), whose sum is σ = 4544280576. Its totient is φ = 687132000.

The previous prime is 2165622359. The next prime is 2165622383. The reversal of 2165622366 is 6632265612.

It is a congruent number.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 84090 + ... + 106781.

It is an arithmetic number, because the mean of its divisors is an integer number (142008768).

Almost surely, 2^2165622366 is an apocalyptic number.

2165622366 is an abundant number, since it is smaller than the sum of its proper divisors (2378658210).

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

2165622366 is a wasteful number, since it uses less digits than its factorization.

2165622366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190968.

The product of its digits is 155520, while the sum is 39.

The square root of 2165622366 is about 46536.2478719546. The cubic root of 2165622366 is about 1293.7814182480.

Adding to 2165622366 its reverse (6632265612), we get a palindrome (8797887978).

The spelling of 2165622366 in words is "two billion, one hundred sixty-five million, six hundred twenty-two thousand, three hundred sixty-six".