109578538018 has 32 divisors (see below), whose sum is σ = 175914768384. Its totient is φ = 51012202752.

The previous prime is 109578538007. The next prime is 109578538037. The reversal of 109578538018 is 810835875901.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 109578538018.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1461780 + ... + 1534912.

It is an arithmetic number, because the mean of its divisors is an integer number (5497336512).

Almost surely, 2^109578538018 is an apocalyptic number.

109578538018 is a deficient number, since it is larger than the sum of its proper divisors (66336230366).

109578538018 is a wasteful number, since it uses less digits than its factorization.

109578538018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73626.

The product of its (nonzero) digits is 2419200, while the sum is 55.

The spelling of 109578538018 in words is "one hundred nine billion, five hundred seventy-eight million, five hundred thirty-eight thousand, eighteen".