3981336512406 has 64 divisors (see below), whose sum is σ = 8983669063680. Its totient is φ = 1165849270560.

The previous prime is 3981336512399. The next prime is 3981336512423. The reversal of 3981336512406 is 6042156331893.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7878196 + ... + 8368311.

It is an arithmetic number, because the mean of its divisors is an integer number (140369829120).

Almost surely, 2^{3981336512406} is an apocalyptic number.

3981336512406 is an abundant number, since it is smaller than the sum of its proper divisors (5002332551274).

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

3981336512406 is a wasteful number, since it uses less digits than its factorization.

3981336512406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16246649.

The product of its (nonzero) digits is 2799360, while the sum is 51.

The spelling of 3981336512406 in words is "three trillion, nine hundred eighty-one billion, three hundred thirty-six million, five hundred twelve thousand, four hundred six".