12545320004 has 48 divisors (see below), whose sum is σ = 25707158400. Its totient is φ = 5244777216.

The previous prime is 12545319977. The next prime is 12545320043. The reversal of 12545320004 is 40002354521.

It is a happy number.

It is a super-3 number, since 3×12545320004³ (a number of 31 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 991832 + ... + 1004400.

It is an arithmetic number, because the mean of its divisors is an integer number (535565800).

Almost surely, 2^12545320004 is an apocalyptic number.

12545320004 is a gapful number since it is divisible by the number (14) 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 12545320004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12853579200).

12545320004 is an abundant number, since it is smaller than the sum of its proper divisors (13161838396).

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

12545320004 is a wasteful number, since it uses less digits than its factorization.

12545320004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13452 (or 13450 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

Adding to 12545320004 its reverse (40002354521), we get a palindrome (52547674525).

The spelling of 12545320004 in words is "twelve billion, five hundred forty-five million, three hundred twenty thousand, four".