1216081423825 has 24 divisors (see below), whose sum is σ = 1536494479488. Its totient is φ = 954445951680.

The previous prime is 1216081423811. The next prime is 1216081423841. The reversal of 1216081423825 is 5283241806121.

It is not a de Polignac number, because 1216081423825 - 2³³ = 1207491489233 is a prime.

It is a super-3 number, since 3×1216081423825³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian 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, 36848982 + ... + 36881968.

It is an arithmetic number, because the mean of its divisors is an integer number (64020603312).

Almost surely, 2^{1216081423825} is an apocalyptic number.

It is an amenable number.

1216081423825 is a deficient number, since it is larger than the sum of its proper divisors (320413055663).

1216081423825 is a wasteful number, since it uses less digits than its factorization.

1216081423825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60873 (or 60868 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 43.

The spelling of 1216081423825 in words is "one trillion, two hundred sixteen billion, eighty-one million, four hundred twenty-three thousand, eight hundred twenty-five".