2661636316 has 24 divisors (see below), whose sum is σ = 4810216320. Its totient is φ = 1287326400.

The previous prime is 2661636251. The next prime is 2661636323. The reversal of 2661636316 is 6136361662.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 491946 + ... + 497326.

It is an arithmetic number, because the mean of its divisors is an integer number (200425680).

Almost surely, 2^2661636316 is an apocalyptic number.

It is an amenable number.

2661636316 is a deficient number, since it is larger than the sum of its proper divisors (2148580004).

2661636316 is a wasteful number, since it uses less digits than its factorization.

2661636316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9405 (or 9403 counting only the distinct ones).

The product of its digits is 139968, while the sum is 40.

The square root of 2661636316 is about 51591.0487972478. The cubic root of 2661636316 is about 1385.8500372541.

Adding to 2661636316 its reverse (6136361662), we get a palindrome (8797997978).

The spelling of 2661636316 in words is "two billion, six hundred sixty-one million, six hundred thirty-six thousand, three hundred sixteen".