1223408126549 has 8 divisors (see below), whose sum is σ = 1398213409920. Its totient is φ = 1048611016656.

The previous prime is 1223408126519. The next prime is 1223408126569. The reversal of 1223408126549 is 9456218043221.

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

It is not a de Polignac number, because 1223408126549 - 2³⁶ = 1154688649813 is a prime.

It is a super-2 number, since 2×1223408126549² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223408126519) 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, 1719194 + ... + 2324315.

It is an arithmetic number, because the mean of its divisors is an integer number (174776676240).

Almost surely, 2^{1223408126549} is an apocalyptic number.

It is an amenable number.

1223408126549 is a deficient number, since it is larger than the sum of its proper divisors (174805283371).

1223408126549 is an equidigital number, since it uses as much as digits as its factorization.

1223408126549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4086739.

The product of its (nonzero) digits is 829440, while the sum is 47.

The spelling of 1223408126549 in words is "one trillion, two hundred twenty-three billion, four hundred eight million, one hundred twenty-six thousand, five hundred forty-nine".