161178147 has 64 divisors (see below), whose sum is σ = 269068800. Its totient is φ = 94711680.

The previous prime is 161178137. The next prime is 161178161. The reversal of 161178147 is 741871161.

It is not a de Polignac number, because 161178147 - 2¹² = 161174051 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161178137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 890397 + ... + 890577.

It is an arithmetic number, because the mean of its divisors is an integer number (4204200).

Almost surely, 2^161178147 is an apocalyptic number.

161178147 is a deficient number, since it is larger than the sum of its proper divisors (107890653).

161178147 is a wasteful number, since it uses less digits than its factorization.

161178147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305 (or 299 counting only the distinct ones).

The product of its digits is 9408, while the sum is 36.

The square root of 161178147 is about 12695.5955748441. The cubic root of 161178147 is about 544.2127589700.

The spelling of 161178147 in words is "one hundred sixty-one million, one hundred seventy-eight thousand, one hundred forty-seven".