56669291449 has 2 divisors, whose sum is σ = 56669291450. Its totient is φ = 56669291448.

The previous prime is 56669291447. The next prime is 56669291473. The reversal of 56669291449 is 94419296665.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44421885225 + 12247406224 = 210765^2 + 110668^2 .

It is a cyclic number.

It is not a de Polignac number, because 56669291449 - 2¹ = 56669291447 is a prime.

It is a super-2 number, since 2×56669291449² (a number of 22 digits) contains 22 as substring.

Together with 56669291447, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (56669291447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28334645724 + 28334645725.

It is an arithmetic number, because the mean of its divisors is an integer number (28334645725).

Almost surely, 2^56669291449 is an apocalyptic number.

It is an amenable number.

56669291449 is a deficient number, since it is larger than the sum of its proper divisors (1).

56669291449 is an equidigital number, since it uses as much as digits as its factorization.

56669291449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25194240, while the sum is 61.

The spelling of 56669291449 in words is "fifty-six billion, six hundred sixty-nine million, two hundred ninety-one thousand, four hundred forty-nine".