16563558040 has 32 divisors (see below), whose sum is σ = 37455300000. Its totient is φ = 6592126464.

The previous prime is 16563558001. The next prime is 16563558041. The reversal of 16563558040 is 4085536561.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16563558041) 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 7 ways as a sum of consecutive naturals, for example, 1032465 + ... + 1048384.

It is an arithmetic number, because the mean of its divisors is an integer number (1170478125).

Almost surely, 2^16563558040 is an apocalyptic number.

16563558040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16563558040 is an abundant number, since it is smaller than the sum of its proper divisors (20891741960).

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

16563558040 is a wasteful number, since it uses less digits than its factorization.

16563558040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2081059 (or 2081055 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 43.

The spelling of 16563558040 in words is "sixteen billion, five hundred sixty-three million, five hundred fifty-eight thousand, forty".