56623505563 has 2 divisors, whose sum is σ = 56623505564. Its totient is φ = 56623505562.

The previous prime is 56623505509. The next prime is 56623505567. The reversal of 56623505563 is 36550532665.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56623505563 - 2⁹ = 56623505051 is a prime.

It is not a weakly prime, because it can be changed into another prime (56623505567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28311752781 + 28311752782.

It is an arithmetic number, because the mean of its divisors is an integer number (28311752782).

Almost surely, 2^56623505563 is an apocalyptic number.

56623505563 is a deficient number, since it is larger than the sum of its proper divisors (1).

56623505563 is an equidigital number, since it uses as much as digits as its factorization.

56623505563 is an evil number, because the sum of its binary digits is even.

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

The spelling of 56623505563 in words is "fifty-six billion, six hundred twenty-three million, five hundred five thousand, five hundred sixty-three".