56161166249 has 2 divisors, whose sum is σ = 56161166250. Its totient is φ = 56161166248.

The previous prime is 56161166167. The next prime is 56161166273. The reversal of 56161166249 is 94266116165.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42217099024 + 13944067225 = 205468^2 + 118085^2 .

It is a cyclic number.

It is not a de Polignac number, because 56161166249 - 2¹² = 56161162153 is a prime.

It is not a weakly prime, because it can be changed into another prime (56161168249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28080583124 + 28080583125.

It is an arithmetic number, because the mean of its divisors is an integer number (28080583125).

Almost surely, 2^56161166249 is an apocalyptic number.

It is an amenable number.

56161166249 is a deficient number, since it is larger than the sum of its proper divisors (1).

56161166249 is an equidigital number, since it uses as much as digits as its factorization.

56161166249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 466560, while the sum is 47.

The spelling of 56161166249 in words is "fifty-six billion, one hundred sixty-one million, one hundred sixty-six thousand, two hundred forty-nine".