56554419661 has 2 divisors, whose sum is σ = 56554419662. Its totient is φ = 56554419660.

The previous prime is 56554419641. The next prime is 56554419667. The reversal of 56554419661 is 16691445565.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35874254025 + 20680165636 = 189405^2 + 143806^2 .

It is a cyclic number.

It is not a de Polignac number, because 56554419661 - 2⁷ = 56554419533 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 56554419599 and 56554419608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56554419667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28277209830 + 28277209831.

It is an arithmetic number, because the mean of its divisors is an integer number (28277209831).

Almost surely, 2^56554419661 is an apocalyptic number.

It is an amenable number.

56554419661 is a deficient number, since it is larger than the sum of its proper divisors (1).

56554419661 is an equidigital number, since it uses as much as digits as its factorization.

56554419661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888000, while the sum is 52.

The spelling of 56554419661 in words is "fifty-six billion, five hundred fifty-four million, four hundred nineteen thousand, six hundred sixty-one".