128013064772 has 6 divisors (see below), whose sum is σ = 224022863358. Its totient is φ = 64006532384.

The previous prime is 128013064747. The next prime is 128013064789. The reversal of 128013064772 is 277460310821.

It can be written as a sum of positive squares in only one way, i.e., 119428301056 + 8584763716 = 345584^2 + 92654^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16001633093 + ... + 16001633100.

It is an arithmetic number, because the mean of its divisors is an integer number (37337143893).

Almost surely, 2^128013064772 is an apocalyptic number.

It is an amenable number.

128013064772 is a deficient number, since it is larger than the sum of its proper divisors (96009798586).

128013064772 is a wasteful number, since it uses less digits than its factorization.

128013064772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32003266197 (or 32003266195 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 41.

The spelling of 128013064772 in words is "one hundred twenty-eight billion, thirteen million, sixty-four thousand, seven hundred seventy-two".