109218680491 has 8 divisors (see below), whose sum is σ = 109442128320. Its totient is φ = 108995432832.

The previous prime is 109218680489. The next prime is 109218680521. The reversal of 109218680491 is 194086812901.

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

It is a cyclic number.

It is not a de Polignac number, because 109218680491 - 2¹ = 109218680489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (109218680591) 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, 1067701 + ... + 1165513.

It is an arithmetic number, because the mean of its divisors is an integer number (13680266040).

Almost surely, 2^109218680491 is an apocalyptic number.

109218680491 is a deficient number, since it is larger than the sum of its proper divisors (223447829).

109218680491 is an equidigital number, since it uses as much as digits as its factorization.

109218680491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100085.

The product of its (nonzero) digits is 248832, while the sum is 49.

The spelling of 109218680491 in words is "one hundred nine billion, two hundred eighteen million, six hundred eighty thousand, four hundred ninety-one".