128706504599 has 36 divisors (see below), whose sum is σ = 141361042368. Its totient is φ = 116988412800.

The previous prime is 128706504593. The next prime is 128706504607. The reversal of 128706504599 is 995405607821.

It is not a de Polignac number, because 128706504599 - 2¹⁶ = 128706439063 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128706504593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 370911944 + ... + 370912290.

Almost surely, 2^128706504599 is an apocalyptic number.

128706504599 is a deficient number, since it is larger than the sum of its proper divisors (12654537769).

128706504599 is an frugal number, since it uses more digits than its factorization.

128706504599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 824 (or 448 counting only the distinct ones).

The product of its (nonzero) digits is 5443200, while the sum is 56.

The spelling of 128706504599 in words is "one hundred twenty-eight billion, seven hundred six million, five hundred four thousand, five hundred ninety-nine".