5091291319321 has 3 divisors (see below), whose sum is σ = 5091293575711. Its totient is φ = 5091289062932.

The previous prime is 5091291319267. The next prime is 5091291319351. The reversal of 5091291319321 is 1239131921905.

The square root of 5091291319321 is 2256389.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 754485069321 + 4336806250000 = 868611^2 + 2082500^2 .

It is not a de Polignac number, because 5091291319321 - 2⁷ = 5091291319193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5091291319351) 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 2 ways as a sum of consecutive naturals, for example, 1128195 + ... + 3384583.

Almost surely, 2^{5091291319321} is an apocalyptic number.

5091291319321 is the 2256389-th square number.

5091291319321 is the 1128195-th centered octagonal number.

It is an amenable number.

5091291319321 is a deficient number, since it is larger than the sum of its proper divisors (2256390).

5091291319321 is an frugal number, since it uses more digits than its factorization.

5091291319321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4512778 (or 2256389 counting only the distinct ones).

The product of its (nonzero) digits is 131220, while the sum is 46.

The spelling of 5091291319321 in words is "five trillion, ninety-one billion, two hundred ninety-one million, three hundred nineteen thousand, three hundred twenty-one".