128836915201 has 4 divisors (see below), whose sum is σ = 128839208004. Its totient is φ = 128834622400.

The previous prime is 128836915189. The next prime is 128836915223. The reversal of 128836915201 is 102519638821.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 50618250225 + 78218664976 = 224985^2 + 279676^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128836915201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128836915231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1059940 + ... + 1175221.

It is an arithmetic number, because the mean of its divisors is an integer number (32209802001).

Almost surely, 2^128836915201 is an apocalyptic number.

It is an amenable number.

128836915201 is a deficient number, since it is larger than the sum of its proper divisors (2292803).

128836915201 is an equidigital number, since it uses as much as digits as its factorization.

128836915201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2292802.

The product of its (nonzero) digits is 207360, while the sum is 46.

The spelling of 128836915201 in words is "one hundred twenty-eight billion, eight hundred thirty-six million, nine hundred fifteen thousand, two hundred one".