109158395309 has 4 divisors (see below), whose sum is σ = 115579477404. Its totient is φ = 102737313216.

The previous prime is 109158395273. The next prime is 109158395323. The reversal of 109158395309 is 903593851901.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 58658418025 + 50499977284 = 242195^2 + 224722^2 .

It is a cyclic number.

It is not a de Polignac number, because 109158395309 - 2²⁸ = 108889959853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109158395369) 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, 3210541022 + ... + 3210541055.

It is an arithmetic number, because the mean of its divisors is an integer number (28894869351).

Almost surely, 2^109158395309 is an apocalyptic number.

It is an amenable number.

109158395309 is a deficient number, since it is larger than the sum of its proper divisors (6421082095).

109158395309 is an equidigital number, since it uses as much as digits as its factorization.

109158395309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6421082094.

The product of its (nonzero) digits is 1312200, while the sum is 53.

The spelling of 109158395309 in words is "one hundred nine billion, one hundred fifty-eight million, three hundred ninety-five thousand, three hundred nine".