16564746427 has 8 divisors (see below), whose sum is σ = 16640316000. Its totient is φ = 16489281024.

The previous prime is 16564746403. The next prime is 16564746439. The reversal of 16564746427 is 72464746561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16564746427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16564743427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 302074 + ... + 352672.

It is an arithmetic number, because the mean of its divisors is an integer number (2080039500).

Almost surely, 2^16564746427 is an apocalyptic number.

16564746427 is a deficient number, since it is larger than the sum of its proper divisors (75569573).

16564746427 is a wasteful number, since it uses less digits than its factorization.

16564746427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52085.

The product of its digits is 6773760, while the sum is 52.

The spelling of 16564746427 in words is "sixteen billion, five hundred sixty-four million, seven hundred forty-six thousand, four hundred twenty-seven".