12509727638 has 8 divisors (see below), whose sum is σ = 19082635560. Its totient is φ = 6148849120.

The previous prime is 12509727619. The next prime is 12509727649. The reversal of 12509727638 is 83672790521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53007203 + ... + 53007438.

It is an arithmetic number, because the mean of its divisors is an integer number (2385329445).

Almost surely, 2^12509727638 is an apocalyptic number.

12509727638 is a deficient number, since it is larger than the sum of its proper divisors (6572907922).

12509727638 is a wasteful number, since it uses less digits than its factorization.

12509727638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106014702.

The product of its (nonzero) digits is 1270080, while the sum is 50.

The spelling of 12509727638 in words is "twelve billion, five hundred nine million, seven hundred twenty-seven thousand, six hundred thirty-eight".