3987978567936 has 72 divisors (see below), whose sum is σ = 11578733253024. Its totient is φ = 1208478351360.

The previous prime is 3987978567929. The next prime is 3987978567949. The reversal of 3987978567936 is 6397658797893.

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, 236022481 + ... + 236039376.

Almost surely, 2^{3987978567936} is an apocalyptic number.

It is an amenable number.

3987978567936 is an abundant number, since it is smaller than the sum of its proper divisors (7590754685088).

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

3987978567936 is a wasteful number, since it uses less digits than its factorization.

3987978567936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 472061887 (or 472061873 counting only the distinct ones).

The product of its digits is 25924872960, while the sum is 87.

The spelling of 3987978567936 in words is "three trillion, nine hundred eighty-seven billion, nine hundred seventy-eight million, five hundred sixty-seven thousand, nine hundred thirty-six".