55645340057 has 2 divisors, whose sum is σ = 55645340058. Its totient is φ = 55645340056.

The previous prime is 55645340027. The next prime is 55645340089. The reversal of 55645340057 is 75004354655.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45575418256 + 10069921801 = 213484^2 + 100349^2 .

It is a cyclic number.

It is not a de Polignac number, because 55645340057 - 2¹² = 55645335961 is a prime.

It is not a weakly prime, because it can be changed into another prime (55645340017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27822670028 + 27822670029.

It is an arithmetic number, because the mean of its divisors is an integer number (27822670029).

Almost surely, 2^55645340057 is an apocalyptic number.

It is an amenable number.

55645340057 is a deficient number, since it is larger than the sum of its proper divisors (1).

55645340057 is an equidigital number, since it uses as much as digits as its factorization.

55645340057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1260000, while the sum is 44.

The spelling of 55645340057 in words is "fifty-five billion, six hundred forty-five million, three hundred forty thousand, fifty-seven".