12505729530 has 192 divisors, whose sum is σ = 37019261952. Its totient is φ = 2691118080.

The previous prime is 12505729477. The next prime is 12505729553. The reversal of 12505729530 is 3592750521.

It is an unprimeable number.

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 95 ways as a sum of consecutive naturals, for example, 1682382 + ... + 1689798.

It is an arithmetic number, because the mean of its divisors is an integer number (192808656).

Almost surely, 2^12505729530 is an apocalyptic number.

12505729530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12505729530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18509630976).

12505729530 is an abundant number, since it is smaller than the sum of its proper divisors (24513532422).

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

12505729530 is a wasteful number, since it uses less digits than its factorization.

12505729530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7509 (or 7502 counting only the distinct ones).

The product of its (nonzero) digits is 94500, while the sum is 39.

The spelling of 12505729530 in words is "twelve billion, five hundred five million, seven hundred twenty-nine thousand, five hundred thirty".