128163081599 has 8 divisors (see below), whose sum is σ = 146515545120. Its totient is φ = 109821481056.

The previous prime is 128163081587. The next prime is 128163081623. The reversal of 128163081599 is 995180361821.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-128163081599 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 128163081599.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128163081569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2690444 + ... + 2737665.

It is an arithmetic number, because the mean of its divisors is an integer number (18314443140).

Almost surely, 2^128163081599 is an apocalyptic number.

128163081599 is a deficient number, since it is larger than the sum of its proper divisors (18352463521).

128163081599 is an equidigital number, since it uses as much as digits as its factorization.

128163081599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5431489.

The product of its (nonzero) digits is 933120, while the sum is 53.

The spelling of 128163081599 in words is "one hundred twenty-eight billion, one hundred sixty-three million, eighty-one thousand, five hundred ninety-nine".