67538134161 has 9 divisors (see below), whose sum is σ = 97556208841. Its totient is φ = 45024903012.

The previous prime is 67538134129. The next prime is 67538134163. The reversal of 67538134161 is 16143183576.

The square root of 67538134161 is 259881.

It is a perfect power (a square), and thus also a powerful number.

67538134161 is a `hidden beast` number, since 6 + 7 + 538 + 13 + 41 + 61 = 666.

67538134161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 67538134161 - 2⁵ = 67538134129 is a prime.

It is a super-2 number, since 2×67538134161² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (67538134163) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 736330 + ... + 822956.

Almost surely, 2^67538134161 is an apocalyptic number.

67538134161 is the 259881-st square number.

67538134161 is the 129941-st centered octagonal number.

It is an amenable number.

67538134161 is a deficient number, since it is larger than the sum of its proper divisors (30018074680).

67538134161 is an frugal number, since it uses more digits than its factorization.

67538134161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173260 (or 86630 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The spelling of 67538134161 in words is "sixty-seven billion, five hundred thirty-eight million, one hundred thirty-four thousand, one hundred sixty-one".