1271828812868 has 24 divisors (see below), whose sum is σ = 2399985057120. Its totient is φ = 587751439680.

The previous prime is 1271828812853. The next prime is 1271828812871. The reversal of 1271828812868 is 8682188281721.

It is a self number, because there is not a number n which added to its sum of digits gives 1271828812868.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 204077246 + ... + 204083477.

It is an arithmetic number, because the mean of its divisors is an integer number (99999377380).

Almost surely, 2^{1271828812868} is an apocalyptic number.

It is an amenable number.

1271828812868 is a deficient number, since it is larger than the sum of its proper divisors (1128156244252).

1271828812868 is a wasteful number, since it uses less digits than its factorization.

1271828812868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408160787 (or 408160785 counting only the distinct ones).

The product of its digits is 11010048, while the sum is 62.

The spelling of 1271828812868 in words is "one trillion, two hundred seventy-one billion, eight hundred twenty-eight million, eight hundred twelve thousand, eight hundred sixty-eight".