1287341265888 has 240 divisors, whose sum is σ = 3836500146864. Its totient is φ = 423425802240.

The previous prime is 1287341265877. The next prime is 1287341265929. The reversal of 1287341265888 is 8885621437821.

1287341265888 is a `hidden beast` number, since 1 + 2 + 8 + 7 + 3 + 41 + 2 + 6 + 588 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 71268378 + ... + 71286438.

Almost surely, 2^{1287341265888} is an apocalyptic number.

1287341265888 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1287341265888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1918250073432).

1287341265888 is an abundant number, since it is smaller than the sum of its proper divisors (2549158880976).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1287341265888 is a wasteful number, since it uses less digits than its factorization.

1287341265888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18447 (or 18430 counting only the distinct ones).

The product of its digits is 41287680, while the sum is 63.

The spelling of 1287341265888 in words is "one trillion, two hundred eighty-seven billion, three hundred forty-one million, two hundred sixty-five thousand, eight hundred eighty-eight".