56658756893 has 2 divisors, whose sum is σ = 56658756894. Its totient is φ = 56658756892.

The previous prime is 56658756871. The next prime is 56658756911. The reversal of 56658756893 is 39865785665.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56129664889 + 529092004 = 236917^2 + 23002^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56658756893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56658756793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28329378446 + 28329378447.

It is an arithmetic number, because the mean of its divisors is an integer number (28329378447).

Almost surely, 2^56658756893 is an apocalyptic number.

It is an amenable number.

56658756893 is a deficient number, since it is larger than the sum of its proper divisors (1).

56658756893 is an equidigital number, since it uses as much as digits as its factorization.

56658756893 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592000, while the sum is 68.

Adding to 56658756893 its sum of digits (68), we get a square (56658756961 = 238031²).

The spelling of 56658756893 in words is "fifty-six billion, six hundred fifty-eight million, seven hundred fifty-six thousand, eight hundred ninety-three".