1216444893325 has 6 divisors (see below), whose sum is σ = 1508391667754. Its totient is φ = 973155914640.

The previous prime is 1216444893317. The next prime is 1216444893347. The reversal of 1216444893325 is 5233984446121.

It can be written as a sum of positive squares in 3 ways, for example, as 21756545001 + 1194688348324 = 147501^2 + 1093018^2 .

It is not a de Polignac number, because 1216444893325 - 2³ = 1216444893317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24328897842 + ... + 24328897891.

Almost surely, 2^{1216444893325} is an apocalyptic number.

It is an amenable number.

1216444893325 is a deficient number, since it is larger than the sum of its proper divisors (291946774429).

1216444893325 is an equidigital number, since it uses as much as digits as its factorization.

1216444893325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48657795743 (or 48657795738 counting only the distinct ones).

The product of its digits is 4976640, while the sum is 52.

The spelling of 1216444893325 in words is "one trillion, two hundred sixteen billion, four hundred forty-four million, eight hundred ninety-three thousand, three hundred twenty-five".