1288821664453 has 4 divisors (see below), whose sum is σ = 1288835623008. Its totient is φ = 1288807705900.

The previous prime is 1288821664447. The next prime is 1288821664511. The reversal of 1288821664453 is 3544661288821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1288821664453 - 2²⁹ = 1288284793541 is a prime.

It is a super-2 number, since 2×1288821664453² (a number of 25 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1288821664423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6839851 + ... + 7025752.

It is an arithmetic number, because the mean of its divisors is an integer number (322208905752).

Almost surely, 2^{1288821664453} is an apocalyptic number.

It is an amenable number.

1288821664453 is a deficient number, since it is larger than the sum of its proper divisors (13958555).

1288821664453 is an equidigital number, since it uses as much as digits as its factorization.

1288821664453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13958554.

The product of its digits is 17694720, while the sum is 58.

The spelling of 1288821664453 in words is "one trillion, two hundred eighty-eight billion, eight hundred twenty-one million, six hundred sixty-four thousand, four hundred fifty-three".