4115478821 has 4 divisors (see below), whose sum is σ = 4115647692. Its totient is φ = 4115309952.

The previous prime is 4115478791. The next prime is 4115478841. The reversal of 4115478821 is 1288745114.

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

It can be written as a sum of positive squares in 2 ways, for example, as 135256900 + 3980221921 = 11630^2 + 63089^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4115478821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4115478841) 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 3 ways as a sum of consecutive naturals, for example, 40130 + ... + 99203.

It is an arithmetic number, because the mean of its divisors is an integer number (1028911923).

Almost surely, 2^4115478821 is an apocalyptic number.

It is an amenable number.

4115478821 is a deficient number, since it is larger than the sum of its proper divisors (168871).

4115478821 is a wasteful number, since it uses less digits than its factorization.

4115478821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168870.

The product of its digits is 71680, while the sum is 41.

The square root of 4115478821 is about 64151.9977943010. The cubic root of 4115478821 is about 1602.5322948800.

The spelling of 4115478821 in words is "four billion, one hundred fifteen million, four hundred seventy-eight thousand, eight hundred twenty-one".