109191915365 has 32 divisors (see below), whose sum is σ = 149654778336. Its totient is φ = 75766579200.

The previous prime is 109191915361. The next prime is 109191915389. The reversal of 109191915365 is 563519191901.

It is a Cunningham number, because it is equal to 330442²+1.

It can be written as a sum of positive squares in 16 ways, for example, as 28144088644 + 81047826721 = 167762^2 + 284689^2 .

It is not a de Polignac number, because 109191915365 - 2² = 109191915361 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 (109191915361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 596765 + ... + 757965.

It is an arithmetic number, because the mean of its divisors is an integer number (4676711823).

Almost surely, 2^109191915365 is an apocalyptic number.

It is an amenable number.

109191915365 is a deficient number, since it is larger than the sum of its proper divisors (40462862971).

109191915365 is a wasteful number, since it uses less digits than its factorization.

109191915365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161849.

The product of its (nonzero) digits is 328050, while the sum is 50.

The spelling of 109191915365 in words is "one hundred nine billion, one hundred ninety-one million, nine hundred fifteen thousand, three hundred sixty-five".