3961663768 has 16 divisors (see below), whose sum is σ = 7429968000. Its totient is φ = 1980338976.

The previous prime is 3961663753. The next prime is 3961663777. The reversal of 3961663768 is 8673661693.

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, 26263 + ... + 92806.

It is an arithmetic number, because the mean of its divisors is an integer number (464373000).

Almost surely, 2^3961663768 is an apocalyptic number.

It is an amenable number.

3961663768 is a deficient number, since it is larger than the sum of its proper divisors (3468304232).

3961663768 is a wasteful number, since it uses less digits than its factorization.

3961663768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123234 (or 123230 counting only the distinct ones).

The product of its digits is 5878656, while the sum is 55.

The square root of 3961663768 is about 62941.7490065219. The cubic root of 3961663768 is about 1582.3135161892.

The spelling of 3961663768 in words is "three billion, nine hundred sixty-one million, six hundred sixty-three thousand, seven hundred sixty-eight".