1288749881591 has 8 divisors (see below), whose sum is σ = 1311053134944. Its totient is φ = 1266572280960.

The previous prime is 1288749881569. The next prime is 1288749881677. The reversal of 1288749881591 is 1951889478821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1288749881591 - 2²² = 1288745687287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1288749881561) 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 7 ways as a sum of consecutive naturals, for example, 31392491 + ... + 31433516.

It is an arithmetic number, because the mean of its divisors is an integer number (163881641868).

Almost surely, 2^{1288749881591} is an apocalyptic number.

1288749881591 is a deficient number, since it is larger than the sum of its proper divisors (22303253353).

1288749881591 is an equidigital number, since it uses as much as digits as its factorization.

1288749881591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62826361.

The product of its digits is 92897280, while the sum is 71.

The spelling of 1288749881591 in words is "one trillion, two hundred eighty-eight billion, seven hundred forty-nine million, eight hundred eighty-one thousand, five hundred ninety-one".