63489950181 has 18 divisors (see below), whose sum is σ = 106680393222. Its totient is φ = 36279971280.

The previous prime is 63489950177. The next prime is 63489950219. The reversal of 63489950181 is 18105998436.

63489950181 is a `hidden beast` number, since 6 + 3 + 48 + 99 + 501 + 8 + 1 = 666.

63489950181 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 63186876900 + 303073281 = 251370^2 + 17409^2 .

It is not a de Polignac number, because 63489950181 - 2² = 63489950177 is a prime.

It is a super-2 number, since 2×63489950181² (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 (63489950101) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 71983630 + ... + 71984511.

Almost surely, 2^63489950181 is an apocalyptic number.

It is an amenable number.

63489950181 is a deficient number, since it is larger than the sum of its proper divisors (43190443041).

63489950181 is a wasteful number, since it uses less digits than its factorization.

63489950181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143968161 (or 143968151 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 54.

The spelling of 63489950181 in words is "sixty-three billion, four hundred eighty-nine million, nine hundred fifty thousand, one hundred eighty-one".