38549471689 has 4 divisors (see below), whose sum is σ = 38608506756. Its totient is φ = 38490436624.

The previous prime is 38549471687. The next prime is 38549471717. The reversal of 38549471689 is 98617494583.

38549471689 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4497043600 + 34052428089 = 67060^2 + 184533^2 .

It is a cyclic number.

It is not a de Polignac number, because 38549471689 - 2¹ = 38549471687 is a prime.

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 38549471689.

It is not an unprimeable number, because it can be changed into a prime (38549471687) 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, 29516554 + ... + 29517859.

It is an arithmetic number, because the mean of its divisors is an integer number (9652126689).

Almost surely, 2^38549471689 is an apocalyptic number.

It is an amenable number.

38549471689 is a deficient number, since it is larger than the sum of its proper divisors (59035067).

38549471689 is an equidigital number, since it uses as much as digits as its factorization.

38549471689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59035066.

The product of its digits is 52254720, while the sum is 64.

The spelling of 38549471689 in words is "thirty-eight billion, five hundred forty-nine million, four hundred seventy-one thousand, six hundred eighty-nine".