3878965531989 has 12 divisors (see below), whose sum is σ = 5897842329600. Its totient is φ = 2449872967464.

The previous prime is 3878965531963. The next prime is 3878965531993. The reversal of 3878965531989 is 9891355698783.

3878965531989 is a `hidden beast` number, since 3 + 8 + 78 + 9 + 6 + 5 + 531 + 9 + 8 + 9 = 666.

3878965531989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3878965531989 - 2⁹ = 3878965531477 is a prime.

It is a super-2 number, since 2×3878965531989² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3878965536989) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11342004309 + ... + 11342004650.

It is an arithmetic number, because the mean of its divisors is an integer number (491486860800).

Almost surely, 2^{3878965531989} is an apocalyptic number.

It is an amenable number.

3878965531989 is a deficient number, since it is larger than the sum of its proper divisors (2018876797611).

3878965531989 is a wasteful number, since it uses less digits than its factorization.

3878965531989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22684008984 (or 22684008981 counting only the distinct ones).

The product of its digits is 3527193600, while the sum is 81.

The spelling of 3878965531989 in words is "three trillion, eight hundred seventy-eight billion, nine hundred sixty-five million, five hundred thirty-one thousand, nine hundred eighty-nine".