16500101665601 has 4 divisors (see below), whose sum is σ = 16539481383600. Its totient is φ = 16460721947604.

The previous prime is 16500101665589. The next prime is 16500101665613. The reversal of 16500101665601 is 10656610100561.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (16500101665589) and next prime (16500101665613).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16500101665601 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16500101668601) 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, 19689858371 + ... + 19689859208.

It is an arithmetic number, because the mean of its divisors is an integer number (4134870345900).

Almost surely, 2^{16500101665601} is an apocalyptic number.

It is an amenable number.

16500101665601 is a deficient number, since it is larger than the sum of its proper divisors (39379717999).

16500101665601 is an equidigital number, since it uses as much as digits as its factorization.

16500101665601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39379717998.

The product of its (nonzero) digits is 32400, while the sum is 38.

The spelling of 16500101665601 in words is "sixteen trillion, five hundred billion, one hundred one million, six hundred sixty-five thousand, six hundred one".