55680857 has 2 divisors, whose sum is σ = 55680858. Its totient is φ = 55680856.

The previous prime is 55680839. The next prime is 55680869. The reversal of 55680857 is 75808655.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43771456 + 11909401 = 6616^2 + 3451^2 .

It is a cyclic number.

It is not a de Polignac number, because 55680857 - 2¹⁴ = 55664473 is a prime.

It is not a weakly prime, because it can be changed into another prime (55680817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27840428 + 27840429.

It is an arithmetic number, because the mean of its divisors is an integer number (27840429).

Almost surely, 2^55680857 is an apocalyptic number.

It is an amenable number.

55680857 is a deficient number, since it is larger than the sum of its proper divisors (1).

55680857 is an equidigital number, since it uses as much as digits as its factorization.

55680857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336000, while the sum is 44.

The square root of 55680857 is about 7461.9606672777. The cubic root of 55680857 is about 381.8580674800.

The spelling of 55680857 in words is "fifty-five million, six hundred eighty thousand, eight hundred fifty-seven".