108721664794 has 8 divisors (see below), whose sum is σ = 164578667220. Its totient is φ = 53862109056.

The previous prime is 108721664789. The next prime is 108721664797. The reversal of 108721664794 is 497466127801.

It can be written as a sum of positive squares in 2 ways, for example, as 96028713225 + 12692951569 = 309885^2 + 112663^2 .

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

It is not an unprimeable number, because it can be changed into a prime (108721664797) 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, 249361399 + ... + 249361834.

Almost surely, 2^108721664794 is an apocalyptic number.

108721664794 is a deficient number, since it is larger than the sum of its proper divisors (55857002426).

108721664794 is a wasteful number, since it uses less digits than its factorization.

108721664794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498723344.

The product of its (nonzero) digits is 4064256, while the sum is 55.

The spelling of 108721664794 in words is "one hundred eight billion, seven hundred twenty-one million, six hundred sixty-four thousand, seven hundred ninety-four".