2661517136 has 20 divisors (see below), whose sum is σ = 5163747252. Its totient is φ = 1328937216.

The previous prime is 2661517129. The next prime is 2661517141. The reversal of 2661517136 is 6317151662.

It can be written as a sum of positive squares in 2 ways, for example, as 2627177536 + 34339600 = 51256^2 + 5860^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2661517136.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101741 + ... + 125196.

Almost surely, 2^2661517136 is an apocalyptic number.

It is an amenable number.

2661517136 is a deficient number, since it is larger than the sum of its proper divisors (2502230116).

2661517136 is a wasteful number, since it uses less digits than its factorization.

2661517136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227678 (or 227672 counting only the distinct ones).

The product of its digits is 45360, while the sum is 38.

The square root of 2661517136 is about 51589.8937389873. The cubic root of 2661517136 is about 1385.8293522251.

Adding to 2661517136 its reverse (6317151662), we get a palindrome (8978668798).

The spelling of 2661517136 in words is "two billion, six hundred sixty-one million, five hundred seventeen thousand, one hundred thirty-six".