56556706397 has 2 divisors, whose sum is σ = 56556706398. Its totient is φ = 56556706396.

The previous prime is 56556706387. The next prime is 56556706433. The reversal of 56556706397 is 79360765565.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56555498596 + 1207801 = 237814^2 + 1099^2 .

It is a cyclic number.

It is not a de Polignac number, because 56556706397 - 2¹⁴ = 56556690013 is a prime.

It is a super-2 number, since 2×56556706397² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56556706387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28278353198 + 28278353199.

It is an arithmetic number, because the mean of its divisors is an integer number (28278353199).

Almost surely, 2^56556706397 is an apocalyptic number.

It is an amenable number.

56556706397 is a deficient number, since it is larger than the sum of its proper divisors (1).

56556706397 is an equidigital number, since it uses as much as digits as its factorization.

56556706397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 35721000, while the sum is 59.

The spelling of 56556706397 in words is "fifty-six billion, five hundred fifty-six million, seven hundred six thousand, three hundred ninety-seven".