4065631613 has 4 divisors (see below), whose sum is σ = 4066070268. Its totient is φ = 4065192960.

The previous prime is 4065631573. The next prime is 4065631673. The reversal of 4065631613 is 3161365604.

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 3621391684 + 444239929 = 60178^2 + 21077^2 .

It is a cyclic number.

It is not a de Polignac number, because 4065631613 - 2⁸ = 4065631357 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 (4065631673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 205118 + ... + 224063.

It is an arithmetic number, because the mean of its divisors is an integer number (1016517567).

Almost surely, 2^4065631613 is an apocalyptic number.

It is an amenable number.

4065631613 is a deficient number, since it is larger than the sum of its proper divisors (438655).

4065631613 is an equidigital number, since it uses as much as digits as its factorization.

4065631613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438654.

The product of its (nonzero) digits is 38880, while the sum is 35.

The square root of 4065631613 is about 63762.3055809622. The cubic root of 4065631613 is about 1596.0359700951.

The spelling of 4065631613 in words is "four billion, sixty-five million, six hundred thirty-one thousand, six hundred thirteen".