109018443561 has 16 divisors (see below), whose sum is σ = 153065840640. Its totient is φ = 68827879440.

The previous prime is 109018443559. The next prime is 109018443593. The reversal of 109018443561 is 165344810901.

It is not a de Polignac number, because 109018443561 - 2¹ = 109018443559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (109018443361) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 205785 + ... + 510278.

It is an arithmetic number, because the mean of its divisors is an integer number (9566615040).

Almost surely, 2^109018443561 is an apocalyptic number.

It is an amenable number.

109018443561 is a deficient number, since it is larger than the sum of its proper divisors (44047397079).

109018443561 is a wasteful number, since it uses less digits than its factorization.

109018443561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 718756.

The product of its (nonzero) digits is 103680, while the sum is 42.

The spelling of 109018443561 in words is "one hundred nine billion, eighteen million, four hundred forty-three thousand, five hundred sixty-one".