56171853629 has 2 divisors, whose sum is σ = 56171853630. Its totient is φ = 56171853628.

The previous prime is 56171853607. The next prime is 56171853641. The reversal of 56171853629 is 92635817165.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30792177529 + 25379676100 = 175477^2 + 159310^2 .

It is a cyclic number.

It is not a de Polignac number, because 56171853629 - 2¹² = 56171849533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56171853229) 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, 28085926814 + 28085926815.

It is an arithmetic number, because the mean of its divisors is an integer number (28085926815).

Almost surely, 2^56171853629 is an apocalyptic number.

It is an amenable number.

56171853629 is a deficient number, since it is larger than the sum of its proper divisors (1).

56171853629 is an equidigital number, since it uses as much as digits as its factorization.

56171853629 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2721600, while the sum is 53.

The spelling of 56171853629 in words is "fifty-six billion, one hundred seventy-one million, eight hundred fifty-three thousand, six hundred twenty-nine".