2681768564 has 72 divisors (see below), whose sum is σ = 5106436608. Its totient is φ = 1231833600.

The previous prime is 2681768563. The next prime is 2681768611. The reversal of 2681768564 is 4658671862.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2681768563) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 12025757 + ... + 12025979.

Almost surely, 2^2681768564 is an apocalyptic number.

It is an amenable number.

2681768564 is a deficient number, since it is larger than the sum of its proper divisors (2424668044).

2681768564 is a wasteful number, since it uses less digits than its factorization.

2681768564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465 (or 446 counting only the distinct ones).

The product of its digits is 3870720, while the sum is 53.

The square root of 2681768564 is about 51785.7950021046. The cubic root of 2681768564 is about 1389.3353902281.

The spelling of 2681768564 in words is "two billion, six hundred eighty-one million, seven hundred sixty-eight thousand, five hundred sixty-four".