6550978289 has 16 divisors (see below), whose sum is σ = 7225804800. Its totient is φ = 5911423056.

The previous prime is 6550978283. The next prime is 6550978351. The reversal of 6550978289 is 9828790556.

It is a cyclic number.

It is not a de Polignac number, because 6550978289 - 2¹² = 6550974193 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6550978283) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73082 + ... + 135804.

It is an arithmetic number, because the mean of its divisors is an integer number (451612800).

Almost surely, 2^6550978289 is an apocalyptic number.

It is an amenable number.

6550978289 is a deficient number, since it is larger than the sum of its proper divisors (674826511).

6550978289 is a wasteful number, since it uses less digits than its factorization.

6550978289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63004.

The product of its (nonzero) digits is 10886400, while the sum is 59.

The square root of 6550978289 is about 80938.1139451618. The cubic root of 6550978289 is about 1871.1217771982.

The spelling of 6550978289 in words is "six billion, five hundred fifty million, nine hundred seventy-eight thousand, two hundred eighty-nine".