56205210557 has 2 divisors, whose sum is σ = 56205210558. Its totient is φ = 56205210556.

The previous prime is 56205210553. The next prime is 56205210599. The reversal of 56205210557 is 75501250265.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56106923161 + 98287396 = 236869^2 + 9914^2 .

It is a cyclic number.

It is not a de Polignac number, because 56205210557 - 2² = 56205210553 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56205210557.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56205210553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28102605278 + 28102605279.

It is an arithmetic number, because the mean of its divisors is an integer number (28102605279).

Almost surely, 2^56205210557 is an apocalyptic number.

It is an amenable number.

56205210557 is a deficient number, since it is larger than the sum of its proper divisors (1).

56205210557 is an equidigital number, since it uses as much as digits as its factorization.

56205210557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 105000, while the sum is 38.

The spelling of 56205210557 in words is "fifty-six billion, two hundred five million, two hundred ten thousand, five hundred fifty-seven".