3988261971585 has 32 divisors (see below), whose sum is σ = 7169909184000. Its totient is φ = 2103173347968.

The previous prime is 3988261971569. The next prime is 3988261971601. The reversal of 3988261971585 is 5851791628893.

3988261971585 is a `hidden beast` number, since 3 + 9 + 8 + 8 + 26 + 19 + 7 + 1 + 585 = 666.

It is an interprime number because it is at equal distance from previous prime (3988261971569) and next prime (3988261971601).

It is not a de Polignac number, because 3988261971585 - 2⁴ = 3988261971569 is a prime.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 165958105 + ... + 165982134.

It is an arithmetic number, because the mean of its divisors is an integer number (224059662000).

Almost surely, 2^{3988261971585} is an apocalyptic number.

It is an amenable number.

3988261971585 is a deficient number, since it is larger than the sum of its proper divisors (3181647212415).

3988261971585 is a wasteful number, since it uses less digits than its factorization.

3988261971585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331940342 (or 331940336 counting only the distinct ones).

The product of its digits is 261273600, while the sum is 72.

The spelling of 3988261971585 in words is "three trillion, nine hundred eighty-eight billion, two hundred sixty-one million, nine hundred seventy-one thousand, five hundred eighty-five".