128383940444128 has 96 divisors (see below), whose sum is σ = 258462410008320. Its totient is φ = 62758810920960.

The previous prime is 128383940444099. The next prime is 128383940444143. The reversal of 128383940444128 is 821444049383821.

It is a happy number.

It is a super-2 number, since 2×128383940444128² (a number of 29 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (61) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 162010600 + ... + 162801112.

It is an arithmetic number, because the mean of its divisors is an integer number (2692316770920).

Almost surely, 2^{128383940444128} is an apocalyptic number.

It is an amenable number.

128383940444128 is an abundant number, since it is smaller than the sum of its proper divisors (130078469564192).

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

128383940444128 is a wasteful number, since it uses less digits than its factorization.

128383940444128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 791160 (or 791152 counting only the distinct ones).

The product of its (nonzero) digits is 42467328, while the sum is 61.

The spelling of 128383940444128 in words is "one hundred twenty-eight trillion, three hundred eighty-three billion, nine hundred forty million, four hundred forty-four thousand, one hundred twenty-eight".