5566181201939 has 2 divisors, whose sum is σ = 5566181201940. Its totient is φ = 5566181201938.

The previous prime is 5566181201747. The next prime is 5566181201957. The reversal of 5566181201939 is 9391021816655.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 5566181201939 - 2¹⁶ = 5566181136403 is a prime.

It is not a weakly prime, because it can be changed into another prime (5566181201239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2783090600969 + 2783090600970.

It is an arithmetic number, because the mean of its divisors is an integer number (2783090600970).

Almost surely, 2^{5566181201939} is an apocalyptic number.

5566181201939 is a deficient number, since it is larger than the sum of its proper divisors (1).

5566181201939 is an equidigital number, since it uses as much as digits as its factorization.

5566181201939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3499200, while the sum is 56.

The spelling of 5566181201939 in words is "five trillion, five hundred sixty-six billion, one hundred eighty-one million, two hundred one thousand, nine hundred thirty-nine".