16425620806464 has 336 divisors, whose sum is σ = 50501363657472. Its totient is φ = 5091015131136.

The previous prime is 16425620806459. The next prime is 16425620806481. The reversal of 16425620806464 is 46460802652461.

16425620806464 is a `hidden beast` number, since 1 + 6 + 4 + 2 + 5 + 620 + 8 + 0 + 6 + 4 + 6 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 16425620806464.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 565158397 + ... + 565187459.

It is an arithmetic number, because the mean of its divisors is an integer number (150301677552).

Almost surely, 2^{16425620806464} 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 16425620806464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25250681828736).

16425620806464 is an abundant number, since it is smaller than the sum of its proper divisors (34075742851008).

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

16425620806464 is a wasteful number, since it uses less digits than its factorization.

16425620806464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30294 (or 30281 counting only the distinct ones).

The product of its (nonzero) digits is 13271040, while the sum is 54.

The spelling of 16425620806464 in words is "sixteen trillion, four hundred twenty-five billion, six hundred twenty million, eight hundred six thousand, four hundred sixty-four".