209306075145 has 8 divisors (see below), whose sum is σ = 334889720256. Its totient is φ = 111629906736.

The previous prime is 209306075141. The next prime is 209306075183. The reversal of 209306075145 is 541570603902.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 209306075145 - 2² = 209306075141 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 209306075097 and 209306075106.

It is not an unprimeable number, because it can be changed into a prime (209306075141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6976869157 + ... + 6976869186.

It is an arithmetic number, because the mean of its divisors is an integer number (41861215032).

Almost surely, 2^209306075145 is an apocalyptic number.

It is an amenable number.

209306075145 is a deficient number, since it is larger than the sum of its proper divisors (125583645111).

209306075145 is a wasteful number, since it uses less digits than its factorization.

209306075145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13953738351.

The product of its (nonzero) digits is 226800, while the sum is 42.

The spelling of 209306075145 in words is "two hundred nine billion, three hundred six million, seventy-five thousand, one hundred forty-five".