4128486817 has 12 divisors (see below), whose sum is σ = 5171951316. Its totient is φ = 3266494560.

The previous prime is 4128486811. The next prime is 4128486847. The reversal of 4128486817 is 7186848214.

It can be written as a sum of positive squares in 2 ways, for example, as 2138970001 + 1989516816 = 46249^2 + 44604^2 .

It is not a de Polignac number, because 4128486817 - 2⁷ = 4128486689 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is not an unprimeable number, because it can be changed into a prime (4128486811) 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, 3239934 + ... + 3241207.

It is an arithmetic number, because the mean of its divisors is an integer number (430995943).

Almost surely, 2^4128486817 is an apocalyptic number.

It is an amenable number.

4128486817 is a deficient number, since it is larger than the sum of its proper divisors (1043464499).

4128486817 is a wasteful number, since it uses less digits than its factorization.

4128486817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6481168 (or 6481161 counting only the distinct ones).

The product of its digits is 688128, while the sum is 49.

The square root of 4128486817 is about 64253.3019929715. The cubic root of 4128486817 is about 1604.2189199655.

The spelling of 4128486817 in words is "four billion, one hundred twenty-eight million, four hundred eighty-six thousand, eight hundred seventeen".