16816590656325 has 144 divisors (see below), whose sum is σ = 32321496916800. Its totient is φ = 8657315251200.

The previous prime is 16816590656317. The next prime is 16816590656363. The reversal of 16816590656325 is 52365609561861.

It is a happy number.

16816590656325 is a `hidden beast` number, since 1 + 6 + 8 + 1 + 6 + 590 + 6 + 5 + 6 + 32 + 5 = 666.

It is not a de Polignac number, because 16816590656325 - 2³ = 16816590656317 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 831712066 + ... + 831732284.

It is an arithmetic number, because the mean of its divisors is an integer number (224454839700).

Almost surely, 2^{16816590656325} is an apocalyptic number.

16816590656325 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16816590656325 is a deficient number, since it is larger than the sum of its proper divisors (15504906260475).

16816590656325 is a wasteful number, since it uses less digits than its factorization.

16816590656325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24994 (or 24977 counting only the distinct ones).

The product of its (nonzero) digits is 69984000, while the sum is 63.

The spelling of 16816590656325 in words is "sixteen trillion, eight hundred sixteen billion, five hundred ninety million, six hundred fifty-six thousand, three hundred twenty-five".