63513444421 has 8 divisors (see below), whose sum is σ = 74274858944. Its totient is φ = 53174046240.

The previous prime is 63513444413. The next prime is 63513444433. The reversal of 63513444421 is 12444431536.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 63513444421 - 2³ = 63513444413 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 (63513444221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105503760 + ... + 105504361.

It is an arithmetic number, because the mean of its divisors is an integer number (9284357368).

Almost surely, 2^63513444421 is an apocalyptic number.

It is an amenable number.

63513444421 is a deficient number, since it is larger than the sum of its proper divisors (10761414523).

63513444421 is a wasteful number, since it uses less digits than its factorization.

63513444421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211008171.

The product of its digits is 138240, while the sum is 37.

Adding to 63513444421 its reverse (12444431536), we get a palindrome (75957875957).

The spelling of 63513444421 in words is "sixty-three billion, five hundred thirteen million, four hundred forty-four thousand, four hundred twenty-one".