74164155 has 16 divisors (see below), whose sum is σ = 127790880. Its totient is φ = 36511488.

The previous prime is 74164151. The next prime is 74164157. The reversal of 74164155 is 55146147.

It is not a de Polignac number, because 74164155 - 2² = 74164151 is a prime.

It is not an unprimeable number, because it can be changed into a prime (74164151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 189970 + ... + 190359.

It is an arithmetic number, because the mean of its divisors is an integer number (7986930).

Almost surely, 2^74164155 is an apocalyptic number.

74164155 is a deficient number, since it is larger than the sum of its proper divisors (53626725).

74164155 is a wasteful number, since it uses less digits than its factorization.

74164155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380350.

The product of its digits is 16800, while the sum is 33.

The square root of 74164155 is about 8611.8612970716. The cubic root of 74164155 is about 420.1438566169.

The spelling of 74164155 in words is "seventy-four million, one hundred sixty-four thousand, one hundred fifty-five".