1280816262271 has 64 divisors (see below), whose sum is σ = 1686934480896. Its totient is φ = 944631705600.

The previous prime is 1280816262247. The next prime is 1280816262289. The reversal of 1280816262271 is 1722626180821.

It is a cyclic number.

It is not a de Polignac number, because 1280816262271 - 2¹³ = 1280816254079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1280816262371) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 81257031 + ... + 81272791.

It is an arithmetic number, because the mean of its divisors is an integer number (26358351264).

Almost surely, 2^{1280816262271} is an apocalyptic number.

1280816262271 is a deficient number, since it is larger than the sum of its proper divisors (406118218625).

1280816262271 is a wasteful number, since it uses less digits than its factorization.

1280816262271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16792.

The product of its (nonzero) digits is 258048, while the sum is 46.

The spelling of 1280816262271 in words is "one trillion, two hundred eighty billion, eight hundred sixteen million, two hundred sixty-two thousand, two hundred seventy-one".