16981948679056 has 45 divisors (see below), whose sum is σ = 33452734359603. Its totient is φ = 8351283528960.

The previous prime is 16981948679009. The next prime is 16981948679057. The reversal of 16981948679056 is 65097684918961.

The square root of 16981948679056 is 4120916.

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

It can be written as a sum of positive squares in 4 ways, for example, as 14800301517456 + 2181647161600 = 3847116^2 + 1477040^2 .

It is a super-2 number, since 2×16981948679056² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16981948679057) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1005495060 + ... + 1005511948.

Almost surely, 2^{16981948679056} is an apocalyptic number.

16981948679056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

16981948679056 is the 4120916-th square number.

It is an amenable number.

16981948679056 is a deficient number, since it is larger than the sum of its proper divisors (16470785680547).

16981948679056 is an frugal number, since it uses more digits than its factorization.

16981948679056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33908 (or 16952 counting only the distinct ones).

The product of its (nonzero) digits is 1410877440, while the sum is 79.

The spelling of 16981948679056 in words is "sixteen trillion, nine hundred eighty-one billion, nine hundred forty-eight million, six hundred seventy-nine thousand, fifty-six".