12728634737 has 8 divisors (see below), whose sum is σ = 15666012096. Its totient is φ = 10071007632.

The previous prime is 12728634719. The next prime is 12728634767. The reversal of 12728634737 is 73743682721.

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

It is not a de Polignac number, because 12728634737 - 2¹⁰ = 12728633713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12728634767) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69937463 + ... + 69937644.

It is an arithmetic number, because the mean of its divisors is an integer number (1958251512).

Almost surely, 2^12728634737 is an apocalyptic number.

It is an amenable number.

12728634737 is a deficient number, since it is larger than the sum of its proper divisors (2937377359).

12728634737 is a wasteful number, since it uses less digits than its factorization.

12728634737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139875127.

The product of its digits is 2370816, while the sum is 50.

The spelling of 12728634737 in words is "twelve billion, seven hundred twenty-eight million, six hundred thirty-four thousand, seven hundred thirty-seven".