2165634364 has 24 divisors (see below), whose sum is σ = 4011638400. Its totient is φ = 1020089520.

The previous prime is 2165634329. The next prime is 2165634371. The reversal of 2165634364 is 4634365612.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65992 + ... + 93199.

It is an arithmetic number, because the mean of its divisors is an integer number (167151600).

Almost surely, 2^2165634364 is an apocalyptic number.

It is an amenable number.

2165634364 is a deficient number, since it is larger than the sum of its proper divisors (1846004036).

2165634364 is a wasteful number, since it uses less digits than its factorization.

2165634364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159393 (or 159391 counting only the distinct ones).

The product of its digits is 311040, while the sum is 40.

The square root of 2165634364 is about 46536.3767820401. The cubic root of 2165634364 is about 1293.7838075166.

Adding to 2165634364 its reverse (4634365612), we get a palindrome (6799999976).

The spelling of 2165634364 in words is "two billion, one hundred sixty-five million, six hundred thirty-four thousand, three hundred sixty-four".