1297127987216 has 80 divisors (see below), whose sum is σ = 2728931616960. Its totient is φ = 595188103680.

The previous prime is 1297127987191. The next prime is 1297127987297. The reversal of 1297127987216 is 6127897217921.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2299286 + ... + 2807306.

It is an arithmetic number, because the mean of its divisors is an integer number (34111645212).

Almost surely, 2^{1297127987216} is an apocalyptic number.

1297127987216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1297127987216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1364465808480).

1297127987216 is an abundant number, since it is smaller than the sum of its proper divisors (1431803629744).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1297127987216 is a wasteful number, since it uses less digits than its factorization.

1297127987216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508312 (or 508306 counting only the distinct ones).

The product of its digits is 10668672, while the sum is 62.

The spelling of 1297127987216 in words is "one trillion, two hundred ninety-seven billion, one hundred twenty-seven million, nine hundred eighty-seven thousand, two hundred sixteen".