75117845 has 16 divisors (see below), whose sum is σ = 98616960. Its totient is φ = 54475200.

The previous prime is 75117829. The next prime is 75117851. The reversal of 75117845 is 54871157.

It is a happy number.

It is not a de Polignac number, because 75117845 - 2⁴ = 75117829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 75117799 and 75117808.

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 15 ways as a sum of consecutive naturals, for example, 19640 + ... + 23150.

It is an arithmetic number, because the mean of its divisors is an integer number (6163560).

Almost surely, 2^75117845 is an apocalyptic number.

It is an amenable number.

75117845 is a deficient number, since it is larger than the sum of its proper divisors (23499115).

75117845 is a wasteful number, since it uses less digits than its factorization.

75117845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3916.

The product of its digits is 39200, while the sum is 38.

The square root of 75117845 is about 8667.0551515495. The cubic root of 75117845 is about 421.9370933387.

The spelling of 75117845 in words is "seventy-five million, one hundred seventeen thousand, eight hundred forty-five".