8189127649 has 4 divisors (see below), whose sum is σ = 8189311536. Its totient is φ = 8188943764.

The previous prime is 8189127631. The next prime is 8189127659. The reversal of 8189127649 is 9467219818.

It is a happy number.

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 8189127649 - 2¹³ = 8189119457 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 8189127649.

It is not an unprimeable number, because it can be changed into a prime (8189127629) 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, 21582 + ... + 129784.

It is an arithmetic number, because the mean of its divisors is an integer number (2047327884).

Almost surely, 2^8189127649 is an apocalyptic number.

It is an amenable number.

8189127649 is a deficient number, since it is larger than the sum of its proper divisors (183887).

8189127649 is a wasteful number, since it uses less digits than its factorization.

8189127649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183886.

The product of its digits is 1741824, while the sum is 55.

The square root of 8189127649 is about 90493.7989532985. The cubic root of 8189127649 is about 2015.6380445103.

The spelling of 8189127649 in words is "eight billion, one hundred eighty-nine million, one hundred twenty-seven thousand, six hundred forty-nine".