16630242405521 has 4 divisors (see below), whose sum is σ = 16630618946544. Its totient is φ = 16629865864500.

The previous prime is 16630242405389. The next prime is 16630242405599. The reversal of 16630242405521 is 12550424203661.

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 16630242405521 - 2²² = 16630238211217 is a prime.

It is a super-2 number, since 2×16630242405521² (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 (16630247405521) 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, 188204255 + ... + 188292596.

It is an arithmetic number, because the mean of its divisors is an integer number (4157654736636).

Almost surely, 2^{16630242405521} is an apocalyptic number.

It is an amenable number.

16630242405521 is a deficient number, since it is larger than the sum of its proper divisors (376541023).

16630242405521 is an equidigital number, since it uses as much as digits as its factorization.

16630242405521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376541022.

The product of its (nonzero) digits is 345600, while the sum is 41.

The spelling of 16630242405521 in words is "sixteen trillion, six hundred thirty billion, two hundred forty-two million, four hundred five thousand, five hundred twenty-one".