1281952072799 has 4 divisors (see below), whose sum is σ = 1309227648864. Its totient is φ = 1254676496736.

The previous prime is 1281952072759. The next prime is 1281952072831. The reversal of 1281952072799 is 9972702591821.

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 1281952072799 - 2¹² = 1281952068703 is a prime.

It is a super-2 number, since 2×1281952072799² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1281952072759) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13637787962 + ... + 13637788055.

It is an arithmetic number, because the mean of its divisors is an integer number (327306912216).

Almost surely, 2^{1281952072799} is an apocalyptic number.

1281952072799 is a deficient number, since it is larger than the sum of its proper divisors (27275576065).

1281952072799 is an equidigital number, since it uses as much as digits as its factorization.

1281952072799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27275576064.

The product of its (nonzero) digits is 11430720, while the sum is 62.

The spelling of 1281952072799 in words is "one trillion, two hundred eighty-one billion, nine hundred fifty-two million, seventy-two thousand, seven hundred ninety-nine".