128696764458 has 8 divisors (see below), whose sum is σ = 257393528928. Its totient is φ = 42898921484.

The previous prime is 128696764451. The next prime is 128696764463. The reversal of 128696764458 is 854467696821.

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

128696764458 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (128696764451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10724730366 + ... + 10724730377.

It is an arithmetic number, because the mean of its divisors is an integer number (32174191116).

Almost surely, 2^128696764458 is an apocalyptic number.

128696764458 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128696764458 is a wasteful number, since it uses less digits than its factorization.

128696764458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21449460748.

The product of its digits is 139345920, while the sum is 66.

The spelling of 128696764458 in words is "one hundred twenty-eight billion, six hundred ninety-six million, seven hundred sixty-four thousand, four hundred fifty-eight".