128700845001 has 81 divisors (see below), whose sum is σ = 199572616269. Its totient is φ = 82991558664.

The previous prime is 128700844931. The next prime is 128700845047. The reversal of 128700845001 is 100548007821.

The square root of 128700845001 is 358749.

It is a perfect power (a square), and thus also a powerful number.

128700845001 is a `hidden beast` number, since 1 + 2 + 8 + 70 + 0 + 84 + 500 + 1 = 666.

It is a tau number, because it is divible by the number of its divisors (81).

It is not a de Polignac number, because 128700845001 - 2¹¹ = 128700842953 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (128700845051) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 1249522716 + ... + 1249522818.

Almost surely, 2^128700845001 is an apocalyptic number.

128700845001 is the 358749-th square number.

128700845001 is the 179375-th centered octagonal number.

It is an amenable number.

128700845001 is a deficient number, since it is larger than the sum of its proper divisors (70871771268).

128700845001 is an frugal number, since it uses more digits than its factorization.

128700845001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316 (or 149 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 36.

Multiplying 128700845001 by its sum of digits (36), we get a square (4633230420036 = 2152494²).

The spelling of 128700845001 in words is "one hundred twenty-eight billion, seven hundred million, eight hundred forty-five thousand, one".