12506304078 has 24 divisors (see below), whose sum is σ = 27150247800. Its totient is φ = 4160574864.

The previous prime is 12506304077. The next prime is 12506304091. The reversal of 12506304078 is 87040360521.

12506304078 is a `hidden beast` number, since 12 + 5 + 0 + 630 + 4 + 0 + 7 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12506304077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 673348 + ... + 691671.

It is an arithmetic number, because the mean of its divisors is an integer number (1131260325).

Almost surely, 2^12506304078 is an apocalyptic number.

12506304078 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12506304078 is an abundant number, since it is smaller than the sum of its proper divisors (14643943722).

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

12506304078 is a wasteful number, since it uses less digits than its factorization.

12506304078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1365536 (or 1365533 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

Adding to 12506304078 its reverse (87040360521), we get a palindrome (99546664599).

The spelling of 12506304078 in words is "twelve billion, five hundred six million, three hundred four thousand, seventy-eight".