167805748881 has 9 divisors (see below), whose sum is σ = 242387856841. Its totient is φ = 111869679972.

The previous prime is 167805748853. The next prime is 167805748909. The reversal of 167805748881 is 188847508761.

The square root of 167805748881 is 409641.

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

167805748881 is a `hidden beast` number, since 1 + 6 + 78 + 0 + 5 + 7 + 488 + 81 = 666.

It is an interprime number because it is at equal distance from previous prime (167805748853) and next prime (167805748909).

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

It is not a de Polignac number, because 167805748881 - 2¹³ = 167805740689 is a prime.

It is a super-2 number, since 2×167805748881² (a number of 23 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 (167805748811) 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, 1160650 + ... + 1297196.

Almost surely, 2^167805748881 is an apocalyptic number.

167805748881 is the 409641-st square number.

167805748881 is the 204821-st centered octagonal number.

It is an amenable number.

167805748881 is a deficient number, since it is larger than the sum of its proper divisors (74582107960).

167805748881 is an frugal number, since it uses more digits than its factorization.

167805748881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273100 (or 136550 counting only the distinct ones).

The product of its (nonzero) digits is 24084480, while the sum is 63.

The spelling of 167805748881 in words is "one hundred sixty-seven billion, eight hundred five million, seven hundred forty-eight thousand, eight hundred eighty-one".