4128692805 has 12 divisors (see below), whose sum is σ = 7156400940. Its totient is φ = 2201969472.

The previous prime is 4128692801. The next prime is 4128692831. The reversal of 4128692805 is 5082968214.

It can be written as a sum of positive squares in 2 ways, for example, as 1088604036 + 3040088769 = 32994^2 + 55137^2 .

It is not a de Polignac number, because 4128692805 - 2² = 4128692801 is a prime.

It is a super-2 number, since 2×4128692805² = 34092208556117536050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 91748729 = 4128692805 / (4 + 1 + 2 + 8 + 6 + 9 + 2 + 8 + 0 + 5).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4128692801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45874320 + ... + 45874409.

It is an arithmetic number, because the mean of its divisors is an integer number (596366745).

Almost surely, 2^4128692805 is an apocalyptic number.

4128692805 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

4128692805 is a deficient number, since it is larger than the sum of its proper divisors (3027708135).

4128692805 is a wasteful number, since it uses less digits than its factorization.

4128692805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91748740 (or 91748737 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The square root of 4128692805 is about 64254.9049100534. The cubic root of 4128692805 is about 1604.2455999870.

The spelling of 4128692805 in words is "four billion, one hundred twenty-eight million, six hundred ninety-two thousand, eight hundred five".