128737372389 has 8 divisors (see below), whose sum is σ = 172269505440. Its totient is φ = 85515077136.

The previous prime is 128737372369. The next prime is 128737372471. The reversal of 128737372389 is 983273737821.

It is a happy number.

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

It is not a de Polignac number, because 128737372389 - 2⁸ = 128737372133 is a prime.

It is a super-2 number, since 2×128737372389² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128737372369) 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, 77458479 + ... + 77460140.

It is an arithmetic number, because the mean of its divisors is an integer number (21533688180).

Almost surely, 2^128737372389 is an apocalyptic number.

It is an amenable number.

128737372389 is a deficient number, since it is larger than the sum of its proper divisors (43532133051).

128737372389 is a wasteful number, since it uses less digits than its factorization.

128737372389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154918899.

The product of its digits is 21337344, while the sum is 60.

The spelling of 128737372389 in words is "one hundred twenty-eight billion, seven hundred thirty-seven million, three hundred seventy-two thousand, three hundred eighty-nine".