1280720808543 has 8 divisors (see below), whose sum is σ = 1862866630656. Its totient is φ = 776194429400.

The previous prime is 1280720808541. The next prime is 1280720808599. The reversal of 1280720808543 is 3458080270821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1280720808543 - 2¹ = 1280720808541 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1280720808492 and 1280720808501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1280720808541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19404860703 + ... + 19404860768.

It is an arithmetic number, because the mean of its divisors is an integer number (232858328832).

Almost surely, 2^{1280720808543} is an apocalyptic number.

1280720808543 is a deficient number, since it is larger than the sum of its proper divisors (582145822113).

1280720808543 is a wasteful number, since it uses less digits than its factorization.

1280720808543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38809721485.

The product of its (nonzero) digits is 860160, while the sum is 48.

The spelling of 1280720808543 in words is "one trillion, two hundred eighty billion, seven hundred twenty million, eight hundred eight thousand, five hundred forty-three".