4063649921 has 4 divisors (see below), whose sum is σ = 4078009392. Its totient is φ = 4049290452.

The previous prime is 4063649917. The next prime is 4063649929. The reversal of 4063649921 is 1299463604.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4063649921 - 2² = 4063649917 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4063649929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7179311 + ... + 7179876.

It is an arithmetic number, because the mean of its divisors is an integer number (1019502348).

Almost surely, 2^4063649921 is an apocalyptic number.

It is an amenable number.

4063649921 is a deficient number, since it is larger than the sum of its proper divisors (14359471).

4063649921 is a wasteful number, since it uses less digits than its factorization.

4063649921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14359470.

The product of its (nonzero) digits is 279936, while the sum is 44.

The square root of 4063649921 is about 63746.7640041438. The cubic root of 4063649921 is about 1595.7766118093.

The spelling of 4063649921 in words is "four billion, sixty-three million, six hundred forty-nine thousand, nine hundred twenty-one".