12618217824 has 48 divisors (see below), whose sum is σ = 33222974400. Its totient is φ = 4193354880.

The previous prime is 12618217789. The next prime is 12618217847. The reversal of 12618217824 is 42871281621.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×12618217824² (a number of 21 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 7 ways as a sum of consecutive naturals, for example, 166774 + ... + 230325.

It is an arithmetic number, because the mean of its divisors is an integer number (692145300).

Almost surely, 2^12618217824 is an apocalyptic number.

It is an amenable number.

12618217824 is an abundant number, since it is smaller than the sum of its proper divisors (20604756576).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12618217824 is a wasteful number, since it uses less digits than its factorization.

12618217824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397443 (or 397435 counting only the distinct ones).

The product of its digits is 86016, while the sum is 42.

The spelling of 12618217824 in words is "twelve billion, six hundred eighteen million, two hundred seventeen thousand, eight hundred twenty-four".