75145538 has 32 divisors (see below), whose sum is σ = 125420400. Its totient is φ = 33546240.

The previous prime is 75145537. The next prime is 75145541. The reversal of 75145538 is 83554157.

It can be written as a sum of positive squares in 8 ways, for example, as 4870849 + 70274689 = 2207^2 + 8383^2 .

It is not an unprimeable number, because it can be changed into a prime (75145537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 167138 + ... + 167586.

Almost surely, 2^75145538 is an apocalyptic number.

75145538 is a deficient number, since it is larger than the sum of its proper divisors (50274862).

75145538 is a wasteful number, since it uses less digits than its factorization.

75145538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662.

The product of its digits is 84000, while the sum is 38.

The square root of 75145538 is about 8668.6526057975. The cubic root of 75145538 is about 421.9889375146.

The spelling of 75145538 in words is "seventy-five million, one hundred forty-five thousand, five hundred thirty-eight".