8178127489 has 9 divisors (see below), whose sum is σ = 9514068417. Its totient is φ = 7009280964.

The previous prime is 8178127487. The next prime is 8178127493. The reversal of 8178127489 is 9847218718.

The square root of 8178127489 is 90433.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 8178127489 - 2¹ = 8178127487 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8178127481) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 626572 + ... + 639490.

It is an arithmetic number, because the mean of its divisors is an integer number (1057118713).

Almost surely, 2^8178127489 is an apocalyptic number.

8178127489 is the 90433-rd square number.

8178127489 is the 45217-th centered octagonal number.

It is an amenable number.

8178127489 is a deficient number, since it is larger than the sum of its proper divisors (1335940928).

8178127489 is an frugal number, since it uses more digits than its factorization.

8178127489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25852 (or 12926 counting only the distinct ones).

The product of its digits is 1806336, while the sum is 55.

The cubic root of 8178127489 is about 2014.7351287938.

The spelling of 8178127489 in words is "eight billion, one hundred seventy-eight million, one hundred twenty-seven thousand, four hundred eighty-nine".