74555557 has 8 divisors (see below), whose sum is σ = 80023896. Its totient is φ = 69207552.

The previous prime is 74555543. The next prime is 74555587. The reversal of 74555557 is 75555547.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 18395521 + 56160036 = 4289^2 + 7494^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 74555557 - 2¹¹ = 74553509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74555587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28798 + ... + 31279.

It is an arithmetic number, because the mean of its divisors is an integer number (10002987).

Almost surely, 2^74555557 is an apocalyptic number.

It is an amenable number.

74555557 is a deficient number, since it is larger than the sum of its proper divisors (5468339).

74555557 is a wasteful number, since it uses less digits than its factorization.

74555557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60167.

The product of its digits is 612500, while the sum is 43.

The square root of 74555557 is about 8634.5559816357. Note that the first 3 decimals coincide. The cubic root of 74555557 is about 420.8816645425.

The spelling of 74555557 in words is "seventy-four million, five hundred fifty-five thousand, five hundred fifty-seven".