12278951172289 has 8 divisors (see below), whose sum is σ = 12611032988840. Its totient is φ = 11946880843776.

The previous prime is 12278951172287. The next prime is 12278951172311. The reversal of 12278951172289 is 98227115987221.

It can be written as a sum of positive squares in 4 ways, for example, as 1826552250000 + 10452398922289 = 1351500^2 + 3233017^2 .

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 12278951172289 - 2¹ = 12278951172287 is a prime.

It is a super-2 number, since 2×12278951172289² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12278951172289.

It is not an unprimeable number, because it can be changed into a prime (12278951172287) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 683154 + ... + 5002459.

It is an arithmetic number, because the mean of its divisors is an integer number (1576379123605).

Almost surely, 2^{12278951172289} is an apocalyptic number.

It is an amenable number.

12278951172289 is a deficient number, since it is larger than the sum of its proper divisors (332081816551).

12278951172289 is an equidigital number, since it uses as much as digits as its factorization.

12278951172289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5744019.

The product of its digits is 20321280, while the sum is 64.

The spelling of 12278951172289 in words is "twelve trillion, two hundred seventy-eight billion, nine hundred fifty-one million, one hundred seventy-two thousand, two hundred eighty-nine".