128539311806 has 16 divisors (see below), whose sum is σ = 198615065040. Its totient is φ = 62351805120.

The previous prime is 128539311773. The next prime is 128539311811. The reversal of 128539311806 is 608113935821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4363961 + ... + 4393316.

It is an arithmetic number, because the mean of its divisors is an integer number (12413441565).

Almost surely, 2^128539311806 is an apocalyptic number.

128539311806 is a deficient number, since it is larger than the sum of its proper divisors (70075753234).

128539311806 is a wasteful number, since it uses less digits than its factorization.

128539311806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8757499.

The product of its (nonzero) digits is 311040, while the sum is 47.

The spelling of 128539311806 in words is "one hundred twenty-eight billion, five hundred thirty-nine million, three hundred eleven thousand, eight hundred six".