63521871117 has 8 divisors (see below), whose sum is σ = 85534401120. Its totient is φ = 41928627600.

The previous prime is 63521871113. The next prime is 63521871137. The reversal of 63521871117 is 71117812536.

63521871117 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 63521871117 - 2² = 63521871113 is a prime.

It is a super-2 number, since 2×63521871117² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63521871113) 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, 104821267 + ... + 104821872.

It is an arithmetic number, because the mean of its divisors is an integer number (10691800140).

Almost surely, 2^63521871117 is an apocalyptic number.

It is an amenable number.

63521871117 is a deficient number, since it is larger than the sum of its proper divisors (22012530003).

63521871117 is a wasteful number, since it uses less digits than its factorization.

63521871117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209643243.

The product of its digits is 70560, while the sum is 42.

The spelling of 63521871117 in words is "sixty-three billion, five hundred twenty-one million, eight hundred seventy-one thousand, one hundred seventeen".