128206836154 has 8 divisors (see below), whose sum is σ = 194074568820. Its totient is φ = 63515313216.

The previous prime is 128206836139. The next prime is 128206836179. The reversal of 128206836154 is 451638602821.

It can be written as a sum of positive squares in 2 ways, for example, as 127572551929 + 634284225 = 357173^2 + 25185^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 294052159 + ... + 294052594.

Almost surely, 2^128206836154 is an apocalyptic number.

128206836154 is a deficient number, since it is larger than the sum of its proper divisors (65867732666).

128206836154 is a wasteful number, since it uses less digits than its factorization.

128206836154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 588104864.

The product of its (nonzero) digits is 552960, while the sum is 46.

The spelling of 128206836154 in words is "one hundred twenty-eight billion, two hundred six million, eight hundred thirty-six thousand, one hundred fifty-four".