6534616991 has 8 divisors (see below), whose sum is σ = 7641811584. Its totient is φ = 5470841880.

The previous prime is 6534616943. The next prime is 6534617041. The reversal of 6534616991 is 1996164356.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-6534616991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6534616901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10854545 + ... + 10855146.

It is an arithmetic number, because the mean of its divisors is an integer number (955226448).

Almost surely, 2^6534616991 is an apocalyptic number.

6534616991 is a deficient number, since it is larger than the sum of its proper divisors (1107194593).

6534616991 is a wasteful number, since it uses less digits than its factorization.

6534616991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21709741.

The product of its digits is 1049760, while the sum is 50.

The square root of 6534616991 is about 80836.9778690421. The cubic root of 6534616991 is about 1869.5627478157.

The spelling of 6534616991 in words is "six billion, five hundred thirty-four million, six hundred sixteen thousand, nine hundred ninety-one".