16651015201 has 4 divisors (see below), whose sum is σ = 16651282500. Its totient is φ = 16650747904.

The previous prime is 16651015189. The next prime is 16651015229. The reversal of 16651015201 is 10251015661.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10251015661 = 467 ⋅21950783.

It can be written as a sum of positive squares in 2 ways, for example, as 2793016801 + 13857998400 = 52849^2 + 117720^2 .

It is a cyclic number.

It is not a de Polignac number, because 16651015201 - 2¹⁵ = 16650982433 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16651015201.

It is not an unprimeable number, because it can be changed into a prime (16651015261) 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, 14625 + ... + 183073.

It is an arithmetic number, because the mean of its divisors is an integer number (4162820625).

Almost surely, 2^16651015201 is an apocalyptic number.

It is an amenable number.

16651015201 is a deficient number, since it is larger than the sum of its proper divisors (267299).

16651015201 is an equidigital number, since it uses as much as digits as its factorization.

16651015201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267298.

The product of its (nonzero) digits is 1800, while the sum is 28.

The spelling of 16651015201 in words is "sixteen billion, six hundred fifty-one million, fifteen thousand, two hundred one".