75816538 has 8 divisors (see below), whose sum is σ = 129971232. Its totient is φ = 32492796.

The previous prime is 75816529. The next prime is 75816539. The reversal of 75816538 is 83561857.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 75816494 and 75816503.

It is not an unprimeable number, because it can be changed into a prime (75816539) 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 3 ways as a sum of consecutive naturals, for example, 2707720 + ... + 2707747.

It is an arithmetic number, because the mean of its divisors is an integer number (16246404).

Almost surely, 2^75816538 is an apocalyptic number.

75816538 is a deficient number, since it is larger than the sum of its proper divisors (54154694).

75816538 is a wasteful number, since it uses less digits than its factorization.

75816538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5415476.

The product of its digits is 201600, while the sum is 43.

The square root of 75816538 is about 8707.2692619443. The cubic root of 75816538 is about 423.2412449096.

The spelling of 75816538 in words is "seventy-five million, eight hundred sixteen thousand, five hundred thirty-eight".