6516891763 has 4 divisors (see below), whose sum is σ = 6517230408. Its totient is φ = 6516553120.

The previous prime is 6516891727. The next prime is 6516891791. The reversal of 6516891763 is 3671986156.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6516891763 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 6516891763.

It is not an unprimeable number, because it can be changed into a prime (6516891863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138598 + ... + 179563.

It is an arithmetic number, because the mean of its divisors is an integer number (1629307602).

Almost surely, 2^6516891763 is an apocalyptic number.

6516891763 is a deficient number, since it is larger than the sum of its proper divisors (338645).

6516891763 is a wasteful number, since it uses less digits than its factorization.

6516891763 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338644.

The product of its digits is 1632960, while the sum is 52.

The square root of 6516891763 is about 80727.2677786137. The cubic root of 6516891763 is about 1867.8708132035.

The spelling of 6516891763 in words is "six billion, five hundred sixteen million, eight hundred ninety-one thousand, seven hundred sixty-three".