1287566016868 has 6 divisors (see below), whose sum is σ = 2253240529526. Its totient is φ = 643783008432.

The previous prime is 1287566016857. The next prime is 1287566016889. The reversal of 1287566016868 is 8686106657821.

It can be written as a sum of positive squares in only one way, i.e., 1006165474084 + 281400542784 = 1003078^2 + 530472^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160945752105 + ... + 160945752112.

Almost surely, 2^{1287566016868} is an apocalyptic number.

It is an amenable number.

1287566016868 is a deficient number, since it is larger than the sum of its proper divisors (965674512658).

1287566016868 is a wasteful number, since it uses less digits than its factorization.

1287566016868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321891504221 (or 321891504219 counting only the distinct ones).

The product of its (nonzero) digits is 46448640, while the sum is 64.

The spelling of 1287566016868 in words is "one trillion, two hundred eighty-seven billion, five hundred sixty-six million, sixteen thousand, eight hundred sixty-eight".