38987636109 has 4 divisors (see below), whose sum is σ = 51983514816. Its totient is φ = 25991757404.

The previous prime is 38987636089. The next prime is 38987636141. The reversal of 38987636109 is 90163678983.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 38987636109 - 2¹⁵ = 38987603341 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38987636209) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 6497939349 + ... + 6497939354.

It is an arithmetic number, because the mean of its divisors is an integer number (12995878704).

Almost surely, 2^38987636109 is an apocalyptic number.

It is an amenable number.

38987636109 is a deficient number, since it is larger than the sum of its proper divisors (12995878707).

38987636109 is a wasteful number, since it uses less digits than its factorization.

38987636109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12995878706.

The product of its (nonzero) digits is 11757312, while the sum is 60.

The spelling of 38987636109 in words is "thirty-eight billion, nine hundred eighty-seven million, six hundred thirty-six thousand, one hundred nine".