1228358393605 has 24 divisors (see below), whose sum is σ = 1714828554360. Its totient is φ = 842233875840.

The previous prime is 1228358393533. The next prime is 1228358393627. The reversal of 1228358393605 is 5063938538221.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 233715200481 + 994643193124 = 483441^2 + 997318^2 .

It is not a de Polignac number, because 1228358393605 - 2⁷ = 1228358393477 is a prime.

It is a super-2 number, since 2×1228358393605² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2885175 + ... + 3283435.

It is an arithmetic number, because the mean of its divisors is an integer number (71451189765).

Almost surely, 2^{1228358393605} is an apocalyptic number.

It is an amenable number.

1228358393605 is a deficient number, since it is larger than the sum of its proper divisors (486470160755).

1228358393605 is a wasteful number, since it uses less digits than its factorization.

1228358393605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410869 (or 410862 counting only the distinct ones).

The product of its (nonzero) digits is 9331200, while the sum is 55.

The spelling of 1228358393605 in words is "one trillion, two hundred twenty-eight billion, three hundred fifty-eight million, three hundred ninety-three thousand, six hundred five".