16434146421 has 96 divisors (see below), whose sum is σ = 30318852096. Its totient is φ = 8331120000.

The previous prime is 16434146419. The next prime is 16434146423. The reversal of 16434146421 is 12464143461.

16434146421 is a `hidden beast` number, since 1 + 6 + 4 + 3 + 4 + 1 + 4 + 642 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (16434146419) and next prime (16434146423).

It is not a de Polignac number, because 16434146421 - 2¹ = 16434146419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16434146423) 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 95 ways as a sum of consecutive naturals, for example, 4967850 + ... + 4971156.

It is an arithmetic number, because the mean of its divisors is an integer number (315821376).

Almost surely, 2^16434146421 is an apocalyptic number.

16434146421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16434146421 is a deficient number, since it is larger than the sum of its proper divisors (13884705675).

16434146421 is a wasteful number, since it uses less digits than its factorization.

16434146421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3503 (or 3500 counting only the distinct ones).

The product of its digits is 55296, while the sum is 36.

Adding to 16434146421 its reverse (12464143461), we get a palindrome (28898289882).

The spelling of 16434146421 in words is "sixteen billion, four hundred thirty-four million, one hundred forty-six thousand, four hundred twenty-one".