1287365169929 has 6 divisors (see below), whose sum is σ = 1367547083934. Its totient is φ = 1211637806720.

The previous prime is 1287365169911. The next prime is 1287365169941. The reversal of 1287365169929 is 9299615637821.

It can be written as a sum of positive squares in 3 ways, for example, as 457553486329 + 829811683600 = 676427^2 + 910940^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1287365169929 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1287365169329) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2227275092 + ... + 2227275669.

It is an arithmetic number, because the mean of its divisors is an integer number (227924513989).

Almost surely, 2^{1287365169929} is an apocalyptic number.

It is an amenable number.

1287365169929 is a deficient number, since it is larger than the sum of its proper divisors (80181914005).

1287365169929 is an equidigital number, since it uses as much as digits as its factorization.

1287365169929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4454550795 (or 4454550778 counting only the distinct ones).

The product of its digits is 88179840, while the sum is 68.

The spelling of 1287365169929 in words is "one trillion, two hundred eighty-seven billion, three hundred sixty-five million, one hundred sixty-nine thousand, nine hundred twenty-nine".