63661352041 has 4 divisors (see below), whose sum is σ = 72755830912. Its totient is φ = 54566873172.

The previous prime is 63661352039. The next prime is 63661352077. The reversal of 63661352041 is 14025316636.

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 not a de Polignac number, because 63661352041 - 2¹ = 63661352039 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63661352081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4547239425 + ... + 4547239438.

It is an arithmetic number, because the mean of its divisors is an integer number (18188957728).

Almost surely, 2^63661352041 is an apocalyptic number.

It is an amenable number.

63661352041 is a deficient number, since it is larger than the sum of its proper divisors (9094478871).

63661352041 is an equidigital number, since it uses as much as digits as its factorization.

63661352041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9094478870.

The product of its (nonzero) digits is 77760, while the sum is 37.

Adding to 63661352041 its reverse (14025316636), we get a palindrome (77686668677).

The spelling of 63661352041 in words is "sixty-three billion, six hundred sixty-one million, three hundred fifty-two thousand, forty-one".