1228248089279 has 4 divisors (see below), whose sum is σ = 1256811998376. Its totient is φ = 1199684180184.

The previous prime is 1228248089269. The next prime is 1228248089309. The reversal of 1228248089279 is 9729808428221.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1228248089279 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 (1228248089269) 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 3 ways as a sum of consecutive naturals, for example, 14281954484 + ... + 14281954569.

It is an arithmetic number, because the mean of its divisors is an integer number (314202999594).

Almost surely, 2^{1228248089279} is an apocalyptic number.

1228248089279 is a deficient number, since it is larger than the sum of its proper divisors (28563909097).

1228248089279 is an equidigital number, since it uses as much as digits as its factorization.

1228248089279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28563909096.

The product of its (nonzero) digits is 18579456, while the sum is 62.

The spelling of 1228248089279 in words is "one trillion, two hundred twenty-eight billion, two hundred forty-eight million, eighty-nine thousand, two hundred seventy-nine".