3681778768 has 20 divisors (see below), whose sum is σ = 7189619200. Its totient is φ = 1826393184.

The previous prime is 3681778753. The next prime is 3681778801. The reversal of 3681778768 is 8678771863.

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, 903918 + ... + 907981.

It is an arithmetic number, because the mean of its divisors is an integer number (359480960).

Almost surely, 2^3681778768 is an apocalyptic number.

It is an amenable number.

3681778768 is a deficient number, since it is larger than the sum of its proper divisors (3507840432).

3681778768 is a wasteful number, since it uses less digits than its factorization.

3681778768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1812034 (or 1812028 counting only the distinct ones).

The product of its digits is 18966528, while the sum is 61.

The square root of 3681778768 is about 60677.6628422684. The cubic root of 3681778768 is about 1544.1372375709.

The spelling of 3681778768 in words is "three billion, six hundred eighty-one million, seven hundred seventy-eight thousand, seven hundred sixty-eight".