1278982898721 has 36 divisors (see below), whose sum is σ = 2049613006896. Its totient is φ = 767896770960.

The previous prime is 1278982898719. The next prime is 1278982898759.

1278982898721 is a `hidden beast` number, since 1 + 278 + 9 + 8 + 289 + 8 + 72 + 1 = 666.

1278982898721 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1278982898721 - 2¹ = 1278982898719 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1278982898721.

It is not an unprimeable number, because it can be changed into a prime (1278982896721) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 5371591 + ... + 5604636.

It is an arithmetic number, because the mean of its divisors is an integer number (56933694636).

Almost surely, 2^{1278982898721} is an apocalyptic number.

1278982898721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1278982898721 is a deficient number, since it is larger than the sum of its proper divisors (770630108175).

1278982898721 is a wasteful number, since it uses less digits than its factorization.

1278982898721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10976362 (or 10976348 counting only the distinct ones).

The product of its digits is 130056192, while the sum is 72.

The spelling of 1278982898721 in words is "one trillion, two hundred seventy-eight billion, nine hundred eighty-two million, eight hundred ninety-eight thousand, seven hundred twenty-one".