386988663967681 has 8 divisors (see below), whose sum is σ = 393065081184384. Its totient is φ = 380945911112880.

The previous prime is 386988663967667. The next prime is 386988663967687. The reversal of 386988663967681 is 186769366889683.

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

It is a cyclic number.

It is not a de Polignac number, because 386988663967681 - 2⁷ = 386988663967553 is a prime.

It is a super-2 number, since 2×386988663967681² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 386988663967681.

It is not an unprimeable number, because it can be changed into a prime (386988663967687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8416067305 + ... + 8416113286.

It is an arithmetic number, because the mean of its divisors is an integer number (49133135148048).

Almost surely, 2^{386988663967681} is an apocalyptic number.

It is an amenable number.

386988663967681 is a deficient number, since it is larger than the sum of its proper divisors (6076417216703).

386988663967681 is a wasteful number, since it uses less digits than its factorization.

386988663967681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16832180951.

The product of its digits is 162533081088, while the sum is 94.

The spelling of 386988663967681 in words is "three hundred eighty-six trillion, nine hundred eighty-eight billion, six hundred sixty-three million, nine hundred sixty-seven thousand, six hundred eighty-one".