75145563 has 12 divisors (see below), whose sum is σ = 112564088. Its totient is φ = 50096880.

The previous prime is 75145549. The next prime is 75145571. The reversal of 75145563 is 36554157.

75145563 is a `hidden beast` number, since 7 + 51 + 45 + 563 = 666.

It is not a de Polignac number, because 75145563 - 2⁴ = 75145547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75145463) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 154378 + ... + 154863.

Almost surely, 2^75145563 is an apocalyptic number.

75145563 is a deficient number, since it is larger than the sum of its proper divisors (37418525).

75145563 is an equidigital number, since it uses as much as digits as its factorization.

75145563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309256 (or 309244 counting only the distinct ones).

The product of its digits is 63000, while the sum is 36.

The square root of 75145563 is about 8668.6540477747. The cubic root of 75145563 is about 421.9889843115.

The spelling of 75145563 in words is "seventy-five million, one hundred forty-five thousand, five hundred sixty-three".