16221436526 has 16 divisors (see below), whose sum is σ = 25178513280. Its totient is φ = 7829879040.

The previous prime is 16221436501. The next prime is 16221436541. The reversal of 16221436526 is 62563412261.

It is a self number, because there is not a number n which added to its sum of digits gives 16221436526.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 294491 + ... + 345206.

It is an arithmetic number, because the mean of its divisors is an integer number (1573657080).

Almost surely, 2^16221436526 is an apocalyptic number.

16221436526 is a deficient number, since it is larger than the sum of its proper divisors (8957076754).

16221436526 is a wasteful number, since it uses less digits than its factorization.

16221436526 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 640139.

The product of its digits is 103680, while the sum is 38.

Adding to 16221436526 its reverse (62563412261), we get a palindrome (78784848787).

The spelling of 16221436526 in words is "sixteen billion, two hundred twenty-one million, four hundred thirty-six thousand, five hundred twenty-six".