1276287890289 has 16 divisors (see below), whose sum is σ = 1703158296000. Its totient is φ = 850138248960.

The previous prime is 1276287890287. The next prime is 1276287890299. The reversal of 1276287890289 is 9820987826721.

It is not a de Polignac number, because 1276287890289 - 2¹ = 1276287890287 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1276287890287) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28583109 + ... + 28627725.

It is an arithmetic number, because the mean of its divisors is an integer number (106447393500).

Almost surely, 2^{1276287890289} is an apocalyptic number.

It is an amenable number.

1276287890289 is a deficient number, since it is larger than the sum of its proper divisors (426870405711).

1276287890289 is a wasteful number, since it uses less digits than its factorization.

1276287890289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52480.

The product of its (nonzero) digits is 97542144, while the sum is 69.

The spelling of 1276287890289 in words is "one trillion, two hundred seventy-six billion, two hundred eighty-seven million, eight hundred ninety thousand, two hundred eighty-nine".