12605580834 has 96 divisors (see below), whose sum is σ = 31921225728. Its totient is φ = 3248229600.

The previous prime is 12605580803. The next prime is 12605580839. The reversal of 12605580834 is 43808550621.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (12605580839) 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 47 ways as a sum of consecutive naturals, for example, 635649 + ... + 655179.

It is an arithmetic number, because the mean of its divisors is an integer number (332512768).

Almost surely, 2^12605580834 is an apocalyptic number.

12605580834 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12605580834, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15960612864).

12605580834 is an abundant number, since it is smaller than the sum of its proper divisors (19315644894).

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

12605580834 is a wasteful number, since it uses less digits than its factorization.

12605580834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19692 (or 19681 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 42.

The spelling of 12605580834 in words is "twelve billion, six hundred five million, five hundred eighty thousand, eight hundred thirty-four".