75548945 has 4 divisors (see below), whose sum is σ = 90658740. Its totient is φ = 60439152.

The previous prime is 75548933. The next prime is 75548947. The reversal of 75548945 is 54984557.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54984557 = 113 ⋅486589.

It can be written as a sum of positive squares in 2 ways, for example, as 52432081 + 23116864 = 7241^2 + 4808^2 .

It is a cyclic number.

It is not a de Polignac number, because 75548945 - 2⁴ = 75548929 is a prime.

It is a super-2 number, since 2×75548945² = 11415286181226050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 75548945.

It is not an unprimeable number, because it can be changed into a prime (75548947) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7554890 + ... + 7554899.

It is an arithmetic number, because the mean of its divisors is an integer number (22664685).

Almost surely, 2^75548945 is an apocalyptic number.

It is an amenable number.

75548945 is a deficient number, since it is larger than the sum of its proper divisors (15109795).

75548945 is a wasteful number, since it uses less digits than its factorization.

75548945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15109794.

The product of its digits is 1008000, while the sum is 47.

The square root of 75548945 is about 8691.8896104357. The cubic root of 75548945 is about 422.7427173467.

The spelling of 75548945 in words is "seventy-five million, five hundred forty-eight thousand, nine hundred forty-five".