12418557312 has 128 divisors (see below), whose sum is σ = 38177049600. Its totient is φ = 3503185920.

The previous prime is 12418557311. The next prime is 12418557317. The reversal of 12418557312 is 21375581421.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×12418557312² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12418557311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 183112 + ... + 241592.

It is an arithmetic number, because the mean of its divisors is an integer number (298258200).

Almost surely, 2^12418557312 is an apocalyptic number.

12418557312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12418557312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19088524800).

12418557312 is an abundant number, since it is smaller than the sum of its proper divisors (25758492288).

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

12418557312 is an equidigital number, since it uses as much as digits as its factorization.

12418557312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58584 (or 58572 counting only the distinct ones).

The product of its digits is 67200, while the sum is 39.

The spelling of 12418557312 in words is "twelve billion, four hundred eighteen million, five hundred fifty-seven thousand, three hundred twelve".