1288749884591 has 4 divisors (see below), whose sum is σ = 1387884491112. Its totient is φ = 1189615278072.

The previous prime is 1288749884581. The next prime is 1288749884599. The reversal of 1288749884591 is 1954889478821.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-1288749884591 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 (1288749884599) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49567303241 + ... + 49567303266.

It is an arithmetic number, because the mean of its divisors is an integer number (346971122778).

Almost surely, 2^{1288749884591} is an apocalyptic number.

1288749884591 is a deficient number, since it is larger than the sum of its proper divisors (99134606521).

1288749884591 is an equidigital number, since it uses as much as digits as its factorization.

1288749884591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99134606520.

The product of its digits is 371589120, while the sum is 74.

The spelling of 1288749884591 in words is "one trillion, two hundred eighty-eight billion, seven hundred forty-nine million, eight hundred eighty-four thousand, five hundred ninety-one".