5178108672461 has 2 divisors, whose sum is σ = 5178108672462. Its totient is φ = 5178108672460.

The previous prime is 5178108672439. The next prime is 5178108672491. The reversal of 5178108672461 is 1642768018715.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5160080239561 + 18028432900 = 2271581^2 + 134270^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5178108672461 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 5178108672397 and 5178108672406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5178108672421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2589054336230 + 2589054336231.

It is an arithmetic number, because the mean of its divisors is an integer number (2589054336231).

Almost surely, 2^{5178108672461} is an apocalyptic number.

It is an amenable number.

5178108672461 is a deficient number, since it is larger than the sum of its proper divisors (1).

5178108672461 is an equidigital number, since it uses as much as digits as its factorization.

5178108672461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4515840, while the sum is 56.

The spelling of 5178108672461 in words is "five trillion, one hundred seventy-eight billion, one hundred eight million, six hundred seventy-two thousand, four hundred sixty-one".