56623506553 has 2 divisors, whose sum is σ = 56623506554. Its totient is φ = 56623506552.

The previous prime is 56623506509. The next prime is 56623506571. The reversal of 56623506553 is 35560532665.

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., 47361946384 + 9261560169 = 217628^2 + 96237^2 .

It is a cyclic number.

It is not a de Polignac number, because 56623506553 - 2¹³ = 56623498361 is a prime.

It is not a weakly prime, because it can be changed into another prime (56623500553) 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, 28311753276 + 28311753277.

It is an arithmetic number, because the mean of its divisors is an integer number (28311753277).

Almost surely, 2^56623506553 is an apocalyptic number.

It is an amenable number.

56623506553 is a deficient number, since it is larger than the sum of its proper divisors (1).

56623506553 is an equidigital number, since it uses as much as digits as its factorization.

56623506553 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2430000, while the sum is 46.

The spelling of 56623506553 in words is "fifty-six billion, six hundred twenty-three million, five hundred six thousand, five hundred fifty-three".