1280405263180 has 48 divisors (see below), whose sum is σ = 2716592336640. Its totient is φ = 506884045248.

The previous prime is 1280405263177. The next prime is 1280405263187. The reversal of 1280405263180 is 813625040821.

It is not an unprimeable number, because it can be changed into a prime (1280405263187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3247591 + ... + 3620449.

It is an arithmetic number, because the mean of its divisors is an integer number (56595673680).

Almost surely, 2^{1280405263180} is an apocalyptic number.

1280405263180 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1280405263180 is an abundant number, since it is smaller than the sum of its proper divisors (1436187073460).

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

1280405263180 is a wasteful number, since it uses less digits than its factorization.

1280405263180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374638 (or 374636 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 40.

The spelling of 1280405263180 in words is "one trillion, two hundred eighty billion, four hundred five million, two hundred sixty-three thousand, one hundred eighty".