56391799369 has 2 divisors, whose sum is σ = 56391799370. Its totient is φ = 56391799368.

The previous prime is 56391799367. The next prime is 56391799391. The reversal of 56391799369 is 96399719365.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28806575625 + 27585223744 = 169725^2 + 166088^2 .

It is a cyclic number.

It is not a de Polignac number, because 56391799369 - 2¹ = 56391799367 is a prime.

It is a super-2 number, since 2×56391799369² (a number of 22 digits) contains 22 as substring.

Together with 56391799367, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (56391799367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28195899684 + 28195899685.

It is an arithmetic number, because the mean of its divisors is an integer number (28195899685).

Almost surely, 2^56391799369 is an apocalyptic number.

It is an amenable number.

56391799369 is a deficient number, since it is larger than the sum of its proper divisors (1).

56391799369 is an equidigital number, since it uses as much as digits as its factorization.

56391799369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 74401740, while the sum is 67.

The spelling of 56391799369 in words is "fifty-six billion, three hundred ninety-one million, seven hundred ninety-nine thousand, three hundred sixty-nine".