16318018564 has 27 divisors (see below), whose sum is σ = 29862856597. Its totient is φ = 7801459424.

The previous prime is 16318018553. The next prime is 16318018571. The reversal of 16318018564 is 46581081361.

The square root of 16318018564 is 127742.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 2537136900 + 13780881664 = 50370^2 + 117392^2 .

It is a super-3 number, since 3×16318018564³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16318018564.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5874744 + ... + 5877520.

Almost surely, 2^16318018564 is an apocalyptic number.

16318018564 is the 127742-nd square number.

It is an amenable number.

16318018564 is a deficient number, since it is larger than the sum of its proper divisors (13544838033).

16318018564 is an frugal number, since it uses more digits than its factorization.

16318018564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5604 (or 2802 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 43.

The spelling of 16318018564 in words is "sixteen billion, three hundred eighteen million, eighteen thousand, five hundred sixty-four".