56179121553409 has 2 divisors, whose sum is σ = 56179121553410. Its totient is φ = 56179121553408.

The previous prime is 56179121553407. The next prime is 56179121553439. The reversal of 56179121553409 is 90435512197165.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48503257367184 + 7675864186225 = 6964428^2 + 2770535^2 .

It is a cyclic number.

It is not a de Polignac number, because 56179121553409 - 2¹ = 56179121553407 is a prime.

Together with 56179121553407, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (56179121553407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28089560776704 + 28089560776705.

It is an arithmetic number, because the mean of its divisors is an integer number (28089560776705).

Almost surely, 2^{56179121553409} is an apocalyptic number.

It is an amenable number.

56179121553409 is a deficient number, since it is larger than the sum of its proper divisors (1).

56179121553409 is an equidigital number, since it uses as much as digits as its factorization.

56179121553409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10206000, while the sum is 58.

The spelling of 56179121553409 in words is "fifty-six trillion, one hundred seventy-nine billion, one hundred twenty-one million, five hundred fifty-three thousand, four hundred nine".