63838129656398 has 16 divisors (see below), whose sum is σ = 99933745627296. Its totient is φ = 30527247637920.

The previous prime is 63838129656383. The next prime is 63838129656437. The reversal of 63838129656398 is 89365692183836.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91278833 + ... + 91975548.

It is an arithmetic number, because the mean of its divisors is an integer number (6245859101706).

Almost surely, 2^{63838129656398} is an apocalyptic number.

63838129656398 is a deficient number, since it is larger than the sum of its proper divisors (36095615970898).

63838129656398 is a wasteful number, since it uses less digits than its factorization.

63838129656398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183261979.

The product of its digits is 2418647040, while the sum is 77.

The spelling of 63838129656398 in words is "sixty-three trillion, eight hundred thirty-eight billion, one hundred twenty-nine million, six hundred fifty-six thousand, three hundred ninety-eight".