128002661557312 has 28 divisors (see below), whose sum is σ = 262199000290816. Its totient is φ = 61936771720320.

The previous prime is 128002661557291. The next prime is 128002661557429. The reversal of 128002661557312 is 213755166200821.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32258733288 + ... + 32258737255.

Almost surely, 2^{128002661557312} is an apocalyptic number.

It is an amenable number.

128002661557312 is an abundant number, since it is smaller than the sum of its proper divisors (134196338733504).

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

128002661557312 is an equidigital number, since it uses as much as digits as its factorization.

128002661557312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64517470586 (or 64517470576 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 49.

The spelling of 128002661557312 in words is "one hundred twenty-eight trillion, two billion, six hundred sixty-one million, five hundred fifty-seven thousand, three hundred twelve".