128798171201 has 16 divisors (see below), whose sum is σ = 157169869824. Its totient is φ = 103142715984.

The previous prime is 128798171189. The next prime is 128798171233. The reversal of 128798171201 is 102171897821.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-128798171201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128798171401) 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, 9295271 + ... + 9309116.

It is an arithmetic number, because the mean of its divisors is an integer number (9823116864).

Almost surely, 2^128798171201 is an apocalyptic number.

It is an amenable number.

128798171201 is a deficient number, since it is larger than the sum of its proper divisors (28371698623).

128798171201 is a wasteful number, since it uses less digits than its factorization.

128798171201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18604460.

The product of its (nonzero) digits is 112896, while the sum is 47.

The spelling of 128798171201 in words is "one hundred twenty-eight billion, seven hundred ninety-eight million, one hundred seventy-one thousand, two hundred one".