16564081442 has 16 divisors (see below), whose sum is σ = 25944710400. Its totient is φ = 7916353632.

The previous prime is 16564081439. The next prime is 16564081451. The reversal of 16564081442 is 24418046561.

It is a self number, because there is not a number n which added to its sum of digits gives 16564081442.

It is an unprimeable number.

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, 61067 + ... + 191982.

It is an arithmetic number, because the mean of its divisors is an integer number (1621544400).

Almost surely, 2^16564081442 is an apocalyptic number.

16564081442 is a deficient number, since it is larger than the sum of its proper divisors (9380628958).

16564081442 is a wasteful number, since it uses less digits than its factorization.

16564081442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254497.

The product of its (nonzero) digits is 184320, while the sum is 41.

The spelling of 16564081442 in words is "sixteen billion, five hundred sixty-four million, eighty-one thousand, four hundred forty-two".