16568137506 has 16 divisors (see below), whose sum is σ = 33240809664. Its totient is φ = 5505290064.

The previous prime is 16568137393. The next prime is 16568137507. The reversal of 16568137506 is 60573186561.

It is not an unprimeable number, because it can be changed into a prime (16568137507) 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, 4353550 + ... + 4357353.

It is an arithmetic number, because the mean of its divisors is an integer number (2077550604).

Almost surely, 2^16568137506 is an apocalyptic number.

16568137506 is an abundant number, since it is smaller than the sum of its proper divisors (16672672158).

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

16568137506 is a wasteful number, since it uses less digits than its factorization.

16568137506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8711225.

The product of its (nonzero) digits is 907200, while the sum is 48.

The spelling of 16568137506 in words is "sixteen billion, five hundred sixty-eight million, one hundred thirty-seven thousand, five hundred six".