128005746320672 has 96 divisors (see below), whose sum is σ = 275322041100288. Its totient is φ = 58099703200000.

The previous prime is 128005746320663. The next prime is 128005746320677. The reversal of 128005746320672 is 276023647500821.

It is a super-2 number, since 2×128005746320672² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (128005746320677) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 718434797 + ... + 718612947.

It is an arithmetic number, because the mean of its divisors is an integer number (2867937928128).

Almost surely, 2^{128005746320672} is an apocalyptic number.

It is an amenable number.

128005746320672 is an abundant number, since it is smaller than the sum of its proper divisors (147316294779616).

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

128005746320672 is a wasteful number, since it uses less digits than its factorization.

128005746320672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181134 (or 181126 counting only the distinct ones).

The product of its (nonzero) digits is 6773760, while the sum is 53.

The spelling of 128005746320672 in words is "one hundred twenty-eight trillion, five billion, seven hundred forty-six million, three hundred twenty thousand, six hundred seventy-two".