75545642 has 4 divisors (see below), whose sum is σ = 113318466. Its totient is φ = 37772820.

The previous prime is 75545641. The next prime is 75545663. The reversal of 75545642 is 24654557.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24654557 = 79 ⋅312083.

It can be written as a sum of positive squares in only one way, i.e., 63856081 + 11689561 = 7991^2 + 3419^2 .

It is a junction number, because it is equal to n+sod(n) for n = 75545596 and 75545605.

It is not an unprimeable number, because it can be changed into a prime (75545641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18886409 + ... + 18886412.

Almost surely, 2^75545642 is an apocalyptic number.

75545642 is a deficient number, since it is larger than the sum of its proper divisors (37772824).

75545642 is a wasteful number, since it uses less digits than its factorization.

75545642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37772823.

The product of its digits is 168000, while the sum is 38.

The square root of 75545642 is about 8691.6996036448. The cubic root of 75545642 is about 422.7365564861.

The spelling of 75545642 in words is "seventy-five million, five hundred forty-five thousand, six hundred forty-two".