38998171209 has 4 divisors (see below), whose sum is σ = 51997561616. Its totient is φ = 25998780804.

The previous prime is 38998171171. The next prime is 38998171231. The reversal of 38998171209 is 90217189983.

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 not a de Polignac number, because 38998171209 - 2⁷ = 38998171081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38998171259) 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, 6499695199 + ... + 6499695204.

It is an arithmetic number, because the mean of its divisors is an integer number (12999390404).

Almost surely, 2^38998171209 is an apocalyptic number.

It is an amenable number.

38998171209 is a deficient number, since it is larger than the sum of its proper divisors (12999390407).

38998171209 is a wasteful number, since it uses less digits than its factorization.

38998171209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12999390406.

The product of its (nonzero) digits is 1959552, while the sum is 57.

The spelling of 38998171209 in words is "thirty-eight billion, nine hundred ninety-eight million, one hundred seventy-one thousand, two hundred nine".