3961663782 has 16 divisors (see below), whose sum is σ = 8389405872. Its totient is φ = 1242874880.

The previous prime is 3961663777. The next prime is 3961663801. The reversal of 3961663782 is 2873661693.

It is a super-2 number, since 2×3961663782² = 31389559843221087048, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19419819 + ... + 19420022.

It is an arithmetic number, because the mean of its divisors is an integer number (524337867).

Almost surely, 2^3961663782 is an apocalyptic number.

3961663782 is an abundant number, since it is smaller than the sum of its proper divisors (4427742090).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3961663782 is a wasteful number, since it uses less digits than its factorization.

3961663782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38839863.

The product of its digits is 1959552, while the sum is 51.

The square root of 3961663782 is about 62941.7491177358. The cubic root of 3961663782 is about 1582.3135180531.

The spelling of 3961663782 in words is "three billion, nine hundred sixty-one million, six hundred sixty-three thousand, seven hundred eighty-two".