16065514221 has 16 divisors (see below), whose sum is σ = 22318766400. Its totient is φ = 10266617088.

The previous prime is 16065514189. The next prime is 16065514229. The reversal of 16065514221 is 12241556061.

It is not a de Polignac number, because 16065514221 - 2⁵ = 16065514189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16065514229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 652156 + ... + 676341.

It is an arithmetic number, because the mean of its divisors is an integer number (1394922900).

Almost surely, 2^16065514221 is an apocalyptic number.

It is an amenable number.

16065514221 is a deficient number, since it is larger than the sum of its proper divisors (6253252179).

16065514221 is a wasteful number, since it uses less digits than its factorization.

16065514221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1328668.

The product of its (nonzero) digits is 14400, while the sum is 33.

The spelling of 16065514221 in words is "sixteen billion, sixty-five million, five hundred fourteen thousand, two hundred twenty-one".