16545320361 has 32 divisors (see below), whose sum is σ = 24863932800. Its totient is φ = 10872576000.

The previous prime is 16545320333. The next prime is 16545320417. The reversal of 16545320361 is 16302354561.

16545320361 is a `hidden beast` number, since 1 + 65 + 4 + 532 + 0 + 3 + 61 = 666.

It is not a de Polignac number, because 16545320361 - 2¹⁸ = 16545058217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16545320321) 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 31 ways as a sum of consecutive naturals, for example, 644785 + ... + 669953.

It is an arithmetic number, because the mean of its divisors is an integer number (776997900).

Almost surely, 2^16545320361 is an apocalyptic number.

It is an amenable number.

16545320361 is a deficient number, since it is larger than the sum of its proper divisors (8318612439).

16545320361 is a wasteful number, since it uses less digits than its factorization.

16545320361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25526 (or 25520 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The spelling of 16545320361 in words is "sixteen billion, five hundred forty-five million, three hundred twenty thousand, three hundred sixty-one".