68800056557 has 2 divisors, whose sum is σ = 68800056558. Its totient is φ = 68800056556.

The previous prime is 68800056539. The next prime is 68800056649. The reversal of 68800056557 is 75565000886.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56618298916 + 12181757641 = 237946^2 + 110371^2 .

It is a cyclic number.

It is not a de Polignac number, because 68800056557 - 2¹⁴ = 68800040173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68800086557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34400028278 + 34400028279.

It is an arithmetic number, because the mean of its divisors is an integer number (34400028279).

Almost surely, 2^68800056557 is an apocalyptic number.

It is an amenable number.

68800056557 is a deficient number, since it is larger than the sum of its proper divisors (1).

68800056557 is an equidigital number, since it uses as much as digits as its factorization.

68800056557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016000, while the sum is 50.

The spelling of 68800056557 in words is "sixty-eight billion, eight hundred million, fifty-six thousand, five hundred fifty-seven".