75425009209 has 4 divisors (see below), whose sum is σ = 82281828240. Its totient is φ = 68568190180.

The previous prime is 75425009197. The next prime is 75425009239. The reversal of 75425009209 is 90290052457.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 75425009209 - 2¹⁹ = 75424484921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75425009239) 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, 3428409499 + ... + 3428409520.

It is an arithmetic number, because the mean of its divisors is an integer number (20570457060).

Almost surely, 2^75425009209 is an apocalyptic number.

It is an amenable number.

75425009209 is a deficient number, since it is larger than the sum of its proper divisors (6856819031).

75425009209 is a wasteful number, since it uses less digits than its factorization.

75425009209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6856819030.

The product of its (nonzero) digits is 226800, while the sum is 43.

The spelling of 75425009209 in words is "seventy-five billion, four hundred twenty-five million, nine thousand, two hundred nine".