74705155 has 24 divisors (see below), whose sum is σ = 105349680. Its totient is φ = 50702400.

The previous prime is 74705129. The next prime is 74705167. The reversal of 74705155 is 55150747.

It is a happy number.

It is not a de Polignac number, because 74705155 - 2²⁵ = 41150723 is a prime.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 74705155.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 23236 + ... + 26254.

It is an arithmetic number, because the mean of its divisors is an integer number (4389570).

Almost surely, 2^74705155 is an apocalyptic number.

74705155 is a deficient number, since it is larger than the sum of its proper divisors (30644525).

74705155 is a wasteful number, since it uses less digits than its factorization.

74705155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3139 (or 3132 counting only the distinct ones).

The product of its (nonzero) digits is 24500, while the sum is 34.

The square root of 74705155 is about 8643.2143904915. The cubic root of 74705155 is about 421.1629804373.

The spelling of 74705155 in words is "seventy-four million, seven hundred five thousand, one hundred fifty-five".