3988261978316 has 36 divisors (see below), whose sum is σ = 8767584191184. Its totient is φ = 1553868301920.

The previous prime is 3988261978313. The next prime is 3988261978333. The reversal of 3988261978316 is 6138791628893.

It is a self number, because there is not a number n which added to its sum of digits gives 3988261978316.

It is not an unprimeable number, because it can be changed into a prime (3988261978313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 588583091 + ... + 588589866.

Almost surely, 2^{3988261978316} is an apocalyptic number.

It is an amenable number.

3988261978316 is an abundant number, since it is smaller than the sum of its proper divisors (4779322212868).

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

3988261978316 is a wasteful number, since it uses less digits than its factorization.

3988261978316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1177172990 (or 1177172977 counting only the distinct ones).

The product of its digits is 188116992, while the sum is 71.

The spelling of 3988261978316 in words is "three trillion, nine hundred eighty-eight billion, two hundred sixty-one million, nine hundred seventy-eight thousand, three hundred sixteen".