16540017664 has 33 divisors (see below), whose sum is σ = 33072111907. Its totient is φ = 8267951104.

The previous prime is 16540017649. The next prime is 16540017671. The reversal of 16540017664 is 46671004561.

The square root of 16540017664 is 128608.

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

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 4113447 + ... + 4117465.

Almost surely, 2^16540017664 is an apocalyptic number.

16540017664 is the 128608-th square number.

It is an amenable number.

16540017664 is a deficient number, since it is larger than the sum of its proper divisors (16532094243).

16540017664 is an frugal number, since it uses more digits than its factorization.

16540017664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8058 (or 4021 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 40.

The spelling of 16540017664 in words is "sixteen billion, five hundred forty million, seventeen thousand, six hundred sixty-four".