1288805747812 has 72 divisors (see below), whose sum is σ = 2544561867960. Its totient is φ = 570405158400.

The previous prime is 1288805747767. The next prime is 1288805747813. The reversal of 1288805747812 is 2187475088821.

It can be written as a sum of positive squares in 4 ways, for example, as 9748797696 + 1279056950116 = 98736^2 + 1130954^2 .

It is a super-2 number, since 2×1288805747812² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1288805747813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10036798 + ... + 10164394.

It is an arithmetic number, because the mean of its divisors is an integer number (35341137055).

Almost surely, 2^{1288805747812} is an apocalyptic number.

It is an amenable number.

1288805747812 is a deficient number, since it is larger than the sum of its proper divisors (1255756120148).

1288805747812 is a wasteful number, since it uses less digits than its factorization.

1288805747812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128173 (or 128160 counting only the distinct ones).

The product of its (nonzero) digits is 16056320, while the sum is 61.

The spelling of 1288805747812 in words is "one trillion, two hundred eighty-eight billion, eight hundred five million, seven hundred forty-seven thousand, eight hundred twelve".