56161166273 has 2 divisors, whose sum is σ = 56161166274. Its totient is φ = 56161166272.

The previous prime is 56161166249. The next prime is 56161166339. The reversal of 56161166273 is 37266116165.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34070883889 + 22090282384 = 184583^2 + 148628^2 .

It is a cyclic number.

It is not a de Polignac number, because 56161166273 - 2²⁰ = 56160117697 is a prime.

It is not a weakly prime, because it can be changed into another prime (56161166773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28080583136 + 28080583137.

It is an arithmetic number, because the mean of its divisors is an integer number (28080583137).

Almost surely, 2^56161166273 is an apocalyptic number.

It is an amenable number.

56161166273 is a deficient number, since it is larger than the sum of its proper divisors (1).

56161166273 is an equidigital number, since it uses as much as digits as its factorization.

56161166273 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 272160, while the sum is 44.

The spelling of 56161166273 in words is "fifty-six billion, one hundred sixty-one million, one hundred sixty-six thousand, two hundred seventy-three".