149920178 has 16 divisors (see below), whose sum is σ = 238360320. Its totient is φ = 70476096.

The previous prime is 149920171. The next prime is 149920201. The reversal of 149920178 is 871029941.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (149920171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43175 + ... + 46517.

It is an arithmetic number, because the mean of its divisors is an integer number (14897520).

Almost surely, 2^149920178 is an apocalyptic number.

149920178 is a deficient number, since it is larger than the sum of its proper divisors (88440142).

149920178 is a wasteful number, since it uses less digits than its factorization.

149920178 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4681.

The product of its (nonzero) digits is 36288, while the sum is 41.

The square root of 149920178 is about 12244.1895607672. The cubic root of 149920178 is about 531.2350194991.

The spelling of 149920178 in words is "one hundred forty-nine million, nine hundred twenty thousand, one hundred seventy-eight".