1280271322464 has 288 divisors, whose sum is σ = 3653610831360. Its totient is φ = 392318803968.

The previous prime is 1280271322459. The next prime is 1280271322483. The reversal of 1280271322464 is 4642231720821.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 351431427 + ... + 351435069.

It is an arithmetic number, because the mean of its divisors is an integer number (12686148720).

Almost surely, 2^{1280271322464} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1280271322464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1826805415680).

1280271322464 is an abundant number, since it is smaller than the sum of its proper divisors (2373339508896).

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

1280271322464 is a wasteful number, since it uses less digits than its factorization.

1280271322464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3982 (or 3957 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 42.

The spelling of 1280271322464 in words is "one trillion, two hundred eighty billion, two hundred seventy-one million, three hundred twenty-two thousand, four hundred sixty-four".