128631789498 has 32 divisors (see below), whose sum is σ = 262938816000. Its totient is φ = 41938695216.

The previous prime is 128631789493. The next prime is 128631789571. The reversal of 128631789498 is 894987136821.

128631789498 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×128631789498² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (128631789491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 842536 + ... + 983427.

It is an arithmetic number, because the mean of its divisors is an integer number (8216838000).

Almost surely, 2^128631789498 is an apocalyptic number.

128631789498 is an abundant number, since it is smaller than the sum of its proper divisors (134307026502).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128631789498 is a wasteful number, since it uses less digits than its factorization.

128631789498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1826226.

The product of its digits is 41803776, while the sum is 66.

The spelling of 128631789498 in words is "one hundred twenty-eight billion, six hundred thirty-one million, seven hundred eighty-nine thousand, four hundred ninety-eight".