12645500618857 has 2 divisors, whose sum is σ = 12645500618858. Its totient is φ = 12645500618856.

The previous prime is 12645500618827. The next prime is 12645500618887. The reversal of 12645500618857 is 75881600554621.

It is a balanced prime because it is at equal distance from previous prime (12645500618827) and next prime (12645500618887).

It can be written as a sum of positive squares in only one way, i.e., 10299888910336 + 2345611708521 = 3209344^2 + 1531539^2 .

It is a cyclic number.

It is not a de Polignac number, because 12645500618857 - 2¹¹ = 12645500616809 is a prime.

It is not a weakly prime, because it can be changed into another prime (12645500618827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6322750309428 + 6322750309429.

It is an arithmetic number, because the mean of its divisors is an integer number (6322750309429).

Almost surely, 2^{12645500618857} is an apocalyptic number.

It is an amenable number.

12645500618857 is a deficient number, since it is larger than the sum of its proper divisors (1).

12645500618857 is an equidigital number, since it uses as much as digits as its factorization.

12645500618857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128000, while the sum is 58.

The spelling of 12645500618857 in words is "twelve trillion, six hundred forty-five billion, five hundred million, six hundred eighteen thousand, eight hundred fifty-seven".