12729747540 has 48 divisors (see below), whose sum is σ = 35655238080. Its totient is φ = 3393461760.

The previous prime is 12729747539. The next prime is 12729747551. The reversal of 12729747540 is 4574792721.

It is a self number, because there is not a number n which added to its sum of digits gives 12729747540.

It is a congruent number.

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, 153271 + ... + 221249.

It is an arithmetic number, because the mean of its divisors is an integer number (742817460).

Almost surely, 2^12729747540 is an apocalyptic number.

12729747540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12729747540 is an abundant number, since it is smaller than the sum of its proper divisors (22925490540).

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

12729747540 is a wasteful number, since it uses less digits than its factorization.

12729747540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71112 (or 71110 counting only the distinct ones).

The product of its (nonzero) digits is 987840, while the sum is 48.

The spelling of 12729747540 in words is "twelve billion, seven hundred twenty-nine million, seven hundred forty-seven thousand, five hundred forty".