63443340381 has 8 divisors (see below), whose sum is σ = 84905586720. Its totient is φ = 42138327152.

The previous prime is 63443340379. The next prime is 63443340413. The reversal of 63443340381 is 18304334436.

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

It is a cyclic number.

It is not a de Polignac number, because 63443340381 - 2¹ = 63443340379 is a prime.

It is a super-2 number, since 2×63443340381² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63443340881) 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 7 ways as a sum of consecutive naturals, for example, 39307335 + ... + 39308948.

It is an arithmetic number, because the mean of its divisors is an integer number (10613198340).

Almost surely, 2^63443340381 is an apocalyptic number.

It is an amenable number.

63443340381 is a deficient number, since it is larger than the sum of its proper divisors (21462246339).

63443340381 is a wasteful number, since it uses less digits than its factorization.

63443340381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78616555.

The product of its (nonzero) digits is 248832, while the sum is 39.

The spelling of 63443340381 in words is "sixty-three billion, four hundred forty-three million, three hundred forty thousand, three hundred eighty-one".