128932789387613 has 4 divisors (see below), whose sum is σ = 132417459371100. Its totient is φ = 125448119404128.

The previous prime is 128932789387609. The next prime is 128932789387643. The reversal of 128932789387613 is 316783987239821.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 124385906982649 + 4546882404964 = 11152843^2 + 2132342^2 .

It is a cyclic number.

It is not a de Polignac number, because 128932789387613 - 2² = 128932789387609 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128932789387643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1742334991688 + ... + 1742334991761.

It is an arithmetic number, because the mean of its divisors is an integer number (33104364842775).

Almost surely, 2^{128932789387613} is an apocalyptic number.

It is an amenable number.

128932789387613 is a deficient number, since it is larger than the sum of its proper divisors (3484669983487).

128932789387613 is an equidigital number, since it uses as much as digits as its factorization.

128932789387613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3484669983486.

The product of its digits is 1316818944, while the sum is 77.

The spelling of 128932789387613 in words is "one hundred twenty-eight trillion, nine hundred thirty-two billion, seven hundred eighty-nine million, three hundred eighty-seven thousand, six hundred thirteen".