16520242501 has 8 divisors (see below), whose sum is σ = 18925126784. Its totient is φ = 14126570640.

The previous prime is 16520242433. The next prime is 16520242523. The reversal of 16520242501 is 10524202561.

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

It is not a de Polignac number, because 16520242501 - 2²⁹ = 15983371589 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 16520242501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16520248501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2799945 + ... + 2805838.

It is an arithmetic number, because the mean of its divisors is an integer number (2365640848).

Almost surely, 2^16520242501 is an apocalyptic number.

It is an amenable number.

16520242501 is a deficient number, since it is larger than the sum of its proper divisors (2404884283).

16520242501 is an equidigital number, since it uses as much as digits as its factorization.

16520242501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5606211.

The product of its (nonzero) digits is 4800, while the sum is 28.

The spelling of 16520242501 in words is "sixteen billion, five hundred twenty million, two hundred forty-two thousand, five hundred one".