38685981166 has 16 divisors (see below), whose sum is σ = 66321446400. Its totient is φ = 16579050840.

The previous prime is 38685981161. The next prime is 38685981181. The reversal of 38685981166 is 66118958683.

It is a super-2 number, since 2×38685981166² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38685981161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 522471 + ... + 591901.

It is an arithmetic number, because the mean of its divisors is an integer number (4145090400).

Almost surely, 2^38685981166 is an apocalyptic number.

38685981166 is a deficient number, since it is larger than the sum of its proper divisors (27635465234).

38685981166 is a wasteful number, since it uses less digits than its factorization.

38685981166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109239.

The product of its digits is 14929920, while the sum is 61.

The spelling of 38685981166 in words is "thirty-eight billion, six hundred eighty-five million, nine hundred eighty-one thousand, one hundred sixty-six".