13864781088857 has 2 divisors, whose sum is σ = 13864781088858. Its totient is φ = 13864781088856.

The previous prime is 13864781088841. The next prime is 13864781088901. The reversal of 13864781088857 is 75888018746831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11171076243856 + 2693704845001 = 3342316^2 + 1641251^2 .

It is a cyclic number.

It is not a de Polignac number, because 13864781088857 - 2⁴ = 13864781088841 is a prime.

It is not a weakly prime, because it can be changed into another prime (13864781088757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6932390544428 + 6932390544429.

It is an arithmetic number, because the mean of its divisors is an integer number (6932390544429).

Almost surely, 2^{13864781088857} is an apocalyptic number.

It is an amenable number.

13864781088857 is a deficient number, since it is larger than the sum of its proper divisors (1).

13864781088857 is an equidigital number, since it uses as much as digits as its factorization.

13864781088857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 578027520, while the sum is 74.

The spelling of 13864781088857 in words is "thirteen trillion, eight hundred sixty-four billion, seven hundred eighty-one million, eighty-eight thousand, eight hundred fifty-seven".