1281638688801 has 8 divisors (see below), whose sum is σ = 1708868280000. Its totient is φ = 854417445072.

The previous prime is 1281638688749. The next prime is 1281638688833. The reversal of 1281638688801 is 1088868361821.

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

It is not a de Polignac number, because 1281638688801 - 2⁹ = 1281638688289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1281638688851) 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 7 ways as a sum of consecutive naturals, for example, 1719370 + ... + 2349363.

It is an arithmetic number, because the mean of its divisors is an integer number (213608535000).

Almost surely, 2^{1281638688801} is an apocalyptic number.

It is an amenable number.

1281638688801 is a deficient number, since it is larger than the sum of its proper divisors (427229591199).

1281638688801 is a wasteful number, since it uses less digits than its factorization.

1281638688801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4173735.

The product of its (nonzero) digits is 7077888, while the sum is 60.

The spelling of 1281638688801 in words is "one trillion, two hundred eighty-one billion, six hundred thirty-eight million, six hundred eighty-eight thousand, eight hundred one".