6554780998689 has 64 divisors (see below), whose sum is σ = 10939265187840. Its totient is φ = 3391648200000.

The previous prime is 6554780998643. The next prime is 6554780998721. The reversal of 6554780998689 is 9868990874556.

It is a happy number.

It is not a de Polignac number, because 6554780998689 - 2¹³ = 6554780990497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6554780998639) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 297406332 + ... + 297428370.

It is an arithmetic number, because the mean of its divisors is an integer number (170926018560).

Almost surely, 2^{6554780998689} is an apocalyptic number.

It is an amenable number.

6554780998689 is a deficient number, since it is larger than the sum of its proper divisors (4384484189151).

6554780998689 is a wasteful number, since it uses less digits than its factorization.

6554780998689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27082.

The product of its (nonzero) digits is 9405849600, while the sum is 84.

The spelling of 6554780998689 in words is "six trillion, five hundred fifty-four billion, seven hundred eighty million, nine hundred ninety-eight thousand, six hundred eighty-nine".