1288734468861 has 64 divisors (see below), whose sum is σ = 2145344624640. Its totient is φ = 671330211840.

The previous prime is 1288734468859. The next prime is 1288734468919. The reversal of 1288734468861 is 1688644378821.

It is not a de Polignac number, because 1288734468861 - 2¹ = 1288734468859 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1288734468792 and 1288734468801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1288734468851) 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 63 ways as a sum of consecutive naturals, for example, 1717830 + ... + 2351256.

It is an arithmetic number, because the mean of its divisors is an integer number (33521009760).

Almost surely, 2^{1288734468861} is an apocalyptic number.

It is an amenable number.

1288734468861 is a deficient number, since it is larger than the sum of its proper divisors (856610155779).

1288734468861 is a wasteful number, since it uses less digits than its factorization.

1288734468861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 633634.

The product of its digits is 99090432, while the sum is 66.

The spelling of 1288734468861 in words is "one trillion, two hundred eighty-eight billion, seven hundred thirty-four million, four hundred sixty-eight thousand, eight hundred sixty-one".