16362644864521 has 4 divisors (see below), whose sum is σ = 16366054464000. Its totient is φ = 16359235265044.

The previous prime is 16362644864507. The next prime is 16362644864537. The reversal of 16362644864521 is 12546844626361.

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 a cyclic number.

It is not a de Polignac number, because 16362644864521 - 2³¹ = 16360497380873 is a prime.

It is a super-2 number, since 2×16362644864521² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16362644844521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1704792541 + ... + 1704802138.

It is an arithmetic number, because the mean of its divisors is an integer number (4091513616000).

Almost surely, 2^{16362644864521} is an apocalyptic number.

It is an amenable number.

16362644864521 is a deficient number, since it is larger than the sum of its proper divisors (3409599479).

16362644864521 is an equidigital number, since it uses as much as digits as its factorization.

16362644864521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3409599478.

The product of its digits is 39813120, while the sum is 58.

The spelling of 16362644864521 in words is "sixteen trillion, three hundred sixty-two billion, six hundred forty-four million, eight hundred sixty-four thousand, five hundred twenty-one".