1288749884505 has 8 divisors (see below), whose sum is σ = 2061999815232. Its totient is φ = 687333271728.

The previous prime is 1288749884407. The next prime is 1288749884561. The reversal of 1288749884505 is 5054889478821.

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

It is not a de Polignac number, because 1288749884505 - 2¹⁶ = 1288749818969 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1288749884505.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42958329469 + ... + 42958329498.

It is an arithmetic number, because the mean of its divisors is an integer number (257749976904).

Almost surely, 2^{1288749884505} is an apocalyptic number.

1288749884505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1288749884505 is a deficient number, since it is larger than the sum of its proper divisors (773249930727).

1288749884505 is an equidigital number, since it uses as much as digits as its factorization.

1288749884505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85916658975.

The product of its (nonzero) digits is 206438400, while the sum is 69.

The spelling of 1288749884505 in words is "one trillion, two hundred eighty-eight billion, seven hundred forty-nine million, eight hundred eighty-four thousand, five hundred five".