12128735402 has 32 divisors (see below), whose sum is σ = 21289910400. Its totient is φ = 5073743808.

The previous prime is 12128735387. The next prime is 12128735407. The reversal of 12128735402 is 20453782121.

It is not an unprimeable number, because it can be changed into a prime (12128735407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1022924 + ... + 1034712.

It is an arithmetic number, because the mean of its divisors is an integer number (665309700).

Almost surely, 2^12128735402 is an apocalyptic number.

12128735402 is a deficient number, since it is larger than the sum of its proper divisors (9161174998).

12128735402 is a wasteful number, since it uses less digits than its factorization.

12128735402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13550.

The product of its (nonzero) digits is 26880, while the sum is 35.

The spelling of 12128735402 in words is "twelve billion, one hundred twenty-eight million, seven hundred thirty-five thousand, four hundred two".