3981683619618 has 8 divisors (see below), whose sum is σ = 7963367239248. Its totient is φ = 1327227873204.

The previous prime is 3981683619593. The next prime is 3981683619701. The reversal of 3981683619618 is 8169163861893.

It is a sphenic number, since it is the product of 3 distinct primes.

3981683619618 is an admirable number.

It is a super-2 number, since 2×3981683619618² (a number of 26 digits) contains 22 as substring.

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, 331806968296 + ... + 331806968307.

It is an arithmetic number, because the mean of its divisors is an integer number (995420904906).

Almost surely, 2^{3981683619618} is an apocalyptic number.

3981683619618 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

3981683619618 is a wasteful number, since it uses less digits than its factorization.

3981683619618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 663613936608.

The product of its digits is 80621568, while the sum is 69.

The spelling of 3981683619618 in words is "three trillion, nine hundred eighty-one billion, six hundred eighty-three million, six hundred nineteen thousand, six hundred eighteen".