1281481193159 has 4 divisors (see below), whose sum is σ = 1311283081416. Its totient is φ = 1251679304904.

The previous prime is 1281481193129. The next prime is 1281481193173. The reversal of 1281481193159 is 9513911841821.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1281481193159 - 2²⁰ = 1281480144583 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1281481193159.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1281481193129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14900944064 + ... + 14900944149.

It is an arithmetic number, because the mean of its divisors is an integer number (327820770354).

Almost surely, 2^{1281481193159} is an apocalyptic number.

1281481193159 is a deficient number, since it is larger than the sum of its proper divisors (29801888257).

1281481193159 is an equidigital number, since it uses as much as digits as its factorization.

1281481193159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29801888256.

The product of its digits is 622080, while the sum is 53.

The spelling of 1281481193159 in words is "one trillion, two hundred eighty-one billion, four hundred eighty-one million, one hundred ninety-three thousand, one hundred fifty-nine".