4128826698691 has 4 divisors (see below), whose sum is σ = 4128852496192. Its totient is φ = 4128800901192.

The previous prime is 4128826698679. The next prime is 4128826698727. The reversal of 4128826698691 is 1968966288214.

4128826698691 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4128826698691 is a prime.

It is a super-2 number, since 2×4128826698691² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4128826698691.

It is not an unprimeable number, because it can be changed into a prime (4128826698611) 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 3 ways as a sum of consecutive naturals, for example, 12657171 + ... + 12979276.

It is an arithmetic number, because the mean of its divisors is an integer number (1032213124048).

Almost surely, 2^{4128826698691} is an apocalyptic number.

4128826698691 is a deficient number, since it is larger than the sum of its proper divisors (25797501).

4128826698691 is a wasteful number, since it uses less digits than its factorization.

4128826698691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25797500.

The product of its digits is 143327232, while the sum is 70.

The spelling of 4128826698691 in words is "four trillion, one hundred twenty-eight billion, eight hundred twenty-six million, six hundred ninety-eight thousand, six hundred ninety-one".