16681490152804 has 9 divisors (see below), whose sum is σ = 29192622062457. Its totient is φ = 8340740992104.

The previous prime is 16681490152799. The next prime is 16681490152861. The reversal of 16681490152804 is 40825109418661.

The square root of 16681490152804 is 4084298.

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., 14701841152804 + 1979649000000 = 3834298^2 + 1407000^2 .

It is a super-2 number, since 2×16681490152804² (a number of 27 digits) contains 22 as substring.

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, 7147522 + ... + 9189670.

Almost surely, 2^{16681490152804} is an apocalyptic number.

16681490152804 is the 4084298-th square number.

It is an amenable number.

16681490152804 is a deficient number, since it is larger than the sum of its proper divisors (12511131909653).

16681490152804 is an frugal number, since it uses more digits than its factorization.

16681490152804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4084302 (or 2042151 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 55.

The spelling of 16681490152804 in words is "sixteen trillion, six hundred eighty-one billion, four hundred ninety million, one hundred fifty-two thousand, eight hundred four".