128449731935644 has 48 divisors (see below), whose sum is σ = 258453023774400. Its totient is φ = 54717148371456.

The previous prime is 128449731935597. The next prime is 128449731935671. The reversal of 128449731935644 is 446539137944821.

It is a congruent number.

It is an unprimeable number.

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, 14739222 + ... + 21774850.

It is an arithmetic number, because the mean of its divisors is an integer number (5384437995300).

Almost surely, 2^{128449731935644} is an apocalyptic number.

128449731935644 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

128449731935644 is an abundant number, since it is smaller than the sum of its proper divisors (130003291838756).

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

128449731935644 is a wasteful number, since it uses less digits than its factorization.

128449731935644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7039582 (or 7039580 counting only the distinct ones).

The product of its digits is 627056640, while the sum is 70.

The spelling of 128449731935644 in words is "one hundred twenty-eight trillion, four hundred forty-nine billion, seven hundred thirty-one million, nine hundred thirty-five thousand, six hundred forty-four".