16421491476 has 96 divisors (see below), whose sum is σ = 46626518400. Its totient is φ = 4967101440.

The previous prime is 16421491451. The next prime is 16421491517. The reversal of 16421491476 is 67419412461.

16421491476 is a `hidden beast` number, since 164 + 2 + 14 + 9 + 1 + 476 = 666.

It is a super-3 number, since 3×16421491476³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16285 + ... + 181956.

It is an arithmetic number, because the mean of its divisors is an integer number (485692900).

Almost surely, 2^16421491476 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16421491476, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23313259200).

16421491476 is an abundant number, since it is smaller than the sum of its proper divisors (30205026924).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16421491476 is a wasteful number, since it uses less digits than its factorization.

16421491476 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198326 (or 198318 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The spelling of 16421491476 in words is "sixteen billion, four hundred twenty-one million, four hundred ninety-one thousand, four hundred seventy-six".