16422136521 has 32 divisors (see below), whose sum is σ = 25223497728. Its totient is φ = 9309513600.

The previous prime is 16422136483. The next prime is 16422136537. The reversal of 16422136521 is 12563122461.

It is not a de Polignac number, because 16422136521 - 2⁶ = 16422136457 is a prime.

It is a super-4 number, since 4×16422136521⁴ (a number of 42 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (16422136121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2714526 + ... + 2720568.

It is an arithmetic number, because the mean of its divisors is an integer number (788234304).

Almost surely, 2^16422136521 is an apocalyptic number.

It is an amenable number.

16422136521 is a deficient number, since it is larger than the sum of its proper divisors (8801361207).

16422136521 is a wasteful number, since it uses less digits than its factorization.

16422136521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7061.

The product of its digits is 17280, while the sum is 33.

Adding to 16422136521 its reverse (12563122461), we get a palindrome (28985258982).

The spelling of 16422136521 in words is "sixteen billion, four hundred twenty-two million, one hundred thirty-six thousand, five hundred twenty-one".