74635561 has 16 divisors (see below), whose sum is σ = 100211328. Its totient is φ = 53683200.

The previous prime is 74635541. The next prime is 74635579. The reversal of 74635561 is 16553647.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74635561 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 74635561.

It is not an unprimeable number, because it can be changed into a prime (74635541) 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 15 ways as a sum of consecutive naturals, for example, 36280 + ... + 38281.

It is an arithmetic number, because the mean of its divisors is an integer number (6263208).

Almost surely, 2^74635561 is an apocalyptic number.

It is an amenable number.

74635561 is a deficient number, since it is larger than the sum of its proper divisors (25575767).

74635561 is a wasteful number, since it uses less digits than its factorization.

74635561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74592.

The product of its digits is 75600, while the sum is 37.

The square root of 74635561 is about 8639.1875196687. The cubic root of 74635561 is about 421.0321571456.

The spelling of 74635561 in words is "seventy-four million, six hundred thirty-five thousand, five hundred sixty-one".