53818354682181 has 6 divisors (see below), whose sum is σ = 77737623429830. Its totient is φ = 35878903121448.

The previous prime is 53818354682173. The next prime is 53818354682233. The reversal of 53818354682181 is 18128645381835.

It is a happy number.

53818354682181 is a `hidden beast` number, since 5 + 3 + 8 + 1 + 8 + 3 + 546 + 8 + 2 + 1 + 81 = 666.

It can be written as a sum of positive squares in only one way, i.e., 51804495681156 + 2013859001025 = 7197534^2 + 1419105^2 .

It is not a de Polignac number, because 53818354682181 - 2³ = 53818354682173 is a prime.

It is a super-2 number, since 2×53818354682181² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53818354682161) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2989908593446 + ... + 2989908593463.

Almost surely, 2^{53818354682181} is an apocalyptic number.

It is an amenable number.

53818354682181 is a deficient number, since it is larger than the sum of its proper divisors (23919268747649).

53818354682181 is a wasteful number, since it uses less digits than its factorization.

53818354682181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5979817186915 (or 5979817186912 counting only the distinct ones).

The product of its digits is 44236800, while the sum is 63.

The spelling of 53818354682181 in words is "fifty-three trillion, eight hundred eighteen billion, three hundred fifty-four million, six hundred eighty-two thousand, one hundred eighty-one".