12509743648 has 48 divisors (see below), whose sum is σ = 25093247256. Its totient is φ = 6137958400.

The previous prime is 12509743633. The next prime is 12509743651. The reversal of 12509743648 is 84634790521.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 8624465424 + 3885278224 = 92868^2 + 62332^2 .

It is a super-2 number, since 2×12509743648² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 348090 + ... + 382342.

It is a 1-persistent number, because it is pandigital, but 2⋅12509743648 = 25019487296 is not.

Almost surely, 2^12509743648 is an apocalyptic number.

It is an amenable number.

12509743648 is an abundant number, since it is smaller than the sum of its proper divisors (12583503608).

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

12509743648 is a wasteful number, since it uses less digits than its factorization.

12509743648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34477 (or 34469 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 49.

The spelling of 12509743648 in words is "twelve billion, five hundred nine million, seven hundred forty-three thousand, six hundred forty-eight".