1273854987368 has 8 divisors (see below), whose sum is σ = 2388478101330. Its totient is φ = 636927493680.

The previous prime is 1273854987313. The next prime is 1273854987473. The reversal of 1273854987368 is 8637894583721.

It can be written as a sum of positive squares in only one way, i.e., 820767145444 + 453087841924 = 905962^2 + 673118^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79615936703 + ... + 79615936718.

Almost surely, 2^{1273854987368} is an apocalyptic number.

It is an amenable number.

1273854987368 is a deficient number, since it is larger than the sum of its proper divisors (1114623113962).

1273854987368 is a wasteful number, since it uses less digits than its factorization.

1273854987368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159231873427 (or 159231873423 counting only the distinct ones).

The product of its digits is 487710720, while the sum is 71.

The spelling of 1273854987368 in words is "one trillion, two hundred seventy-three billion, eight hundred fifty-four million, nine hundred eighty-seven thousand, three hundred sixty-eight".