13191780461 has 2 divisors, whose sum is σ = 13191780462. Its totient is φ = 13191780460.

The previous prime is 13191780451. The next prime is 13191780473. The reversal of 13191780461 is 16408719131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13185928900 + 5851561 = 114830^2 + 2419^2 .

It is a cyclic number.

It is not a de Polignac number, because 13191780461 - 2¹⁰ = 13191779437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13191780451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6595890230 + 6595890231.

It is an arithmetic number, because the mean of its divisors is an integer number (6595890231).

Almost surely, 2^13191780461 is an apocalyptic number.

It is an amenable number.

13191780461 is a deficient number, since it is larger than the sum of its proper divisors (1).

13191780461 is an equidigital number, since it uses as much as digits as its factorization.

13191780461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 41.

The spelling of 13191780461 in words is "thirteen billion, one hundred ninety-one million, seven hundred eighty thousand, four hundred sixty-one".