74505569 has 8 divisors (see below), whose sum is σ = 76440840. Its totient is φ = 72576000.

The previous prime is 74505551. The next prime is 74505589. The reversal of 74505569 is 96550547.

It can be written as a sum of positive squares in 4 ways, for example, as 2849344 + 71656225 = 1688^2 + 8465^2 .

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 74505569 - 2⁸ = 74505313 is a prime.

It is a super-2 number, since 2×74505569² = 11102159624027522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (74505589) 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 7 ways as a sum of consecutive naturals, for example, 40469 + ... + 42269.

It is an arithmetic number, because the mean of its divisors is an integer number (9555105).

Almost surely, 2^74505569 is an apocalyptic number.

It is an amenable number.

74505569 is a deficient number, since it is larger than the sum of its proper divisors (1935271).

74505569 is a wasteful number, since it uses less digits than its factorization.

74505569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2851.

The product of its (nonzero) digits is 189000, while the sum is 41.

The square root of 74505569 is about 8631.6608482957. The cubic root of 74505569 is about 420.7875792843.

The spelling of 74505569 in words is "seventy-four million, five hundred five thousand, five hundred sixty-nine".