75000645 has 18 divisors (see below), whose sum is σ = 130101894. Its totient is φ = 39969360.

The previous prime is 75000589. The next prime is 75000661. The reversal of 75000645 is 54600057.

It can be written as a sum of positive squares in only one way, i.e., 60000516 + 15000129 = 7746^2 + 3873^2 .

It is not a de Polignac number, because 75000645 - 2¹¹ = 74998597 is a prime.

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 17 ways as a sum of consecutive naturals, for example, 57450 + ... + 58740.

It is an arithmetic number, because the mean of its divisors is an integer number (7227883).

Almost surely, 2^75000645 is an apocalyptic number.

It is an amenable number.

75000645 is a deficient number, since it is larger than the sum of its proper divisors (55101249).

75000645 is an equidigital number, since it uses as much as digits as its factorization.

75000645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2593 (or 1299 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 75000645 is about 8660.2912768567. The cubic root of 75000645 is about 421.7175415676.

The spelling of 75000645 in words is "seventy-five million, six hundred forty-five", and thus it is an aban number.