75643616 has 24 divisors (see below), whose sum is σ = 149184504. Its totient is φ = 37755520.

The previous prime is 75643609. The next prime is 75643621. The reversal of 75643616 is 61634657.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 75643616.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20126 + ... + 23586.

It is an arithmetic number, because the mean of its divisors is an integer number (6216021).

Almost surely, 2^75643616 is an apocalyptic number.

It is an amenable number.

75643616 is a deficient number, since it is larger than the sum of its proper divisors (73540888).

75643616 is a wasteful number, since it uses less digits than its factorization.

75643616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4154 (or 4146 counting only the distinct ones).

The product of its digits is 90720, while the sum is 38.

The square root of 75643616 is about 8697.3338443456. Note that the first 3 decimals coincide. The cubic root of 75643616 is about 422.9192244236.

The spelling of 75643616 in words is "seventy-five million, six hundred forty-three thousand, six hundred sixteen".