16601187622321 has 4 divisors (see below), whose sum is σ = 16601220742144. Its totient is φ = 16601154502500.

The previous prime is 16601187622309. The next prime is 16601187622351. The reversal of 16601187622321 is 12322678110661.

16601187622321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 16601187622321 - 2¹¹ = 16601187620273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16601187622351) 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, 15796305 + ... + 16814446.

It is an arithmetic number, because the mean of its divisors is an integer number (4150305185536).

Almost surely, 2^{16601187622321} is an apocalyptic number.

It is an amenable number.

16601187622321 is a deficient number, since it is larger than the sum of its proper divisors (33119823).

16601187622321 is an equidigital number, since it uses as much as digits as its factorization.

16601187622321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33119822.

The product of its (nonzero) digits is 290304, while the sum is 46.

The spelling of 16601187622321 in words is "sixteen trillion, six hundred one billion, one hundred eighty-seven million, six hundred twenty-two thousand, three hundred twenty-one".