38668571489 has 4 divisors (see below), whose sum is σ = 38668971924. Its totient is φ = 38668171056.

The previous prime is 38668571477. The next prime is 38668571509. The reversal of 38668571489 is 98417586683.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 98417586683 = 13 ⋅7570583591.

It can be written as a sum of positive squares in 2 ways, for example, as 34117045264 + 4551526225 = 184708^2 + 67465^2 .

It is a cyclic number.

It is not a de Polignac number, because 38668571489 - 2⁸ = 38668571233 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (38668571089) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43619 + ... + 281495.

It is an arithmetic number, because the mean of its divisors is an integer number (9667242981).

Almost surely, 2^38668571489 is an apocalyptic number.

It is an amenable number.

38668571489 is a deficient number, since it is larger than the sum of its proper divisors (400435).

38668571489 is a wasteful number, since it uses less digits than its factorization.

38668571489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400434.

The product of its digits is 69672960, while the sum is 65.

The spelling of 38668571489 in words is "thirty-eight billion, six hundred sixty-eight million, five hundred seventy-one thousand, four hundred eighty-nine".