5161471834621 has 2 divisors, whose sum is σ = 5161471834622. Its totient is φ = 5161471834620.

The previous prime is 5161471834619. The next prime is 5161471834679. The reversal of 5161471834621 is 1264381741615.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2875890264025 + 2285581570596 = 1695845^2 + 1511814^2 .

It is a cyclic number.

It is not a de Polignac number, because 5161471834621 - 2¹ = 5161471834619 is a prime.

Together with 5161471834619, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5161471834121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2580735917310 + 2580735917311.

It is an arithmetic number, because the mean of its divisors is an integer number (2580735917311).

Almost surely, 2^{5161471834621} is an apocalyptic number.

It is an amenable number.

5161471834621 is a deficient number, since it is larger than the sum of its proper divisors (1).

5161471834621 is an equidigital number, since it uses as much as digits as its factorization.

5161471834621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 967680, while the sum is 49.

The spelling of 5161471834621 in words is "five trillion, one hundred sixty-one billion, four hundred seventy-one million, eight hundred thirty-four thousand, six hundred twenty-one".