128725089266 has 16 divisors (see below), whose sum is σ = 198098028000. Its totient is φ = 62711721408.

The previous prime is 128725089217. The next prime is 128725089271. The reversal of 128725089266 is 662980527821.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4813616 + ... + 4840283.

It is an arithmetic number, because the mean of its divisors is an integer number (12381126750).

Almost surely, 2^128725089266 is an apocalyptic number.

128725089266 is a deficient number, since it is larger than the sum of its proper divisors (69372938734).

128725089266 is a wasteful number, since it uses less digits than its factorization.

128725089266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9654073.

The product of its (nonzero) digits is 5806080, while the sum is 56.

The spelling of 128725089266 in words is "one hundred twenty-eight billion, seven hundred twenty-five million, eighty-nine thousand, two hundred sixty-six".