128309668082 has 4 divisors (see below), whose sum is σ = 192464502126. Its totient is φ = 64154834040.

The previous prime is 128309668073. The next prime is 128309668103. The reversal of 128309668082 is 280866903821.

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

It can be written as a sum of positive squares in only one way, i.e., 103786421281 + 24523246801 = 322159^2 + 156599^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 32077417019 + ... + 32077417022.

Almost surely, 2^128309668082 is an apocalyptic number.

128309668082 is a deficient number, since it is larger than the sum of its proper divisors (64154834044).

128309668082 is an equidigital number, since it uses as much as digits as its factorization.

128309668082 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64154834043.

The product of its (nonzero) digits is 1990656, while the sum is 53.

The spelling of 128309668082 in words is "one hundred twenty-eight billion, three hundred nine million, six hundred sixty-eight thousand, eighty-two".