55606487857 has 2 divisors, whose sum is σ = 55606487858. Its totient is φ = 55606487856.

The previous prime is 55606487851. The next prime is 55606487879. The reversal of 55606487857 is 75878460655.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55556375616 + 50112241 = 235704^2 + 7079^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55606487857 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55606487795 and 55606487804.

It is not a weakly prime, because it can be changed into another prime (55606487851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27803243928 + 27803243929.

It is an arithmetic number, because the mean of its divisors is an integer number (27803243929).

Almost surely, 2^55606487857 is an apocalyptic number.

It is an amenable number.

55606487857 is a deficient number, since it is larger than the sum of its proper divisors (1).

55606487857 is an equidigital number, since it uses as much as digits as its factorization.

55606487857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56448000, while the sum is 61.

The spelling of 55606487857 in words is "fifty-five billion, six hundred six million, four hundred eighty-seven thousand, eight hundred fifty-seven".