16521417151 has 4 divisors (see below), whose sum is σ = 16522319304. Its totient is φ = 16520515000.

The previous prime is 16521417097. The next prime is 16521417161. The reversal of 16521417151 is 15171412561.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16521417151 - 2¹⁷ = 16521286079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16521417161) 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 3 ways as a sum of consecutive naturals, for example, 423025 + ... + 460426.

It is an arithmetic number, because the mean of its divisors is an integer number (4130579826).

Almost surely, 2^16521417151 is an apocalyptic number.

16521417151 is a deficient number, since it is larger than the sum of its proper divisors (902153).

16521417151 is an equidigital number, since it uses as much as digits as its factorization.

16521417151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 902152.

The product of its digits is 8400, while the sum is 34.

The spelling of 16521417151 in words is "sixteen billion, five hundred twenty-one million, four hundred seventeen thousand, one hundred fifty-one".