16283718725481 has 27 divisors (see below), whose sum is σ = 23693808192951. Its totient is φ = 10776599367984.

The previous prime is 16283718725437. The next prime is 16283718725497. The reversal of 16283718725481 is 18452781738261.

The square root of 16283718725481 is 4035309.

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

16283718725481 is a `hidden beast` number, since 1 + 6 + 2 + 8 + 3 + 7 + 1 + 87 + 2 + 548 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 11114989227225 + 5168729498256 = 3333915^2 + 2273484^2 .

It is not a de Polignac number, because 16283718725481 - 2¹³ = 16283718717289 is a prime.

It is a super-2 number, since 2×16283718725481² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16283718725581) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1682719015 + ... + 1682728691.

Almost surely, 2^{16283718725481} is an apocalyptic number.

16283718725481 is the 4035309-th square number.

16283718725481 is the 2017655-th centered octagonal number.

It is an amenable number.

16283718725481 is a deficient number, since it is larger than the sum of its proper divisors (7410089467470).

16283718725481 is an frugal number, since it uses more digits than its factorization.

16283718725481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19638 (or 9819 counting only the distinct ones).

The product of its digits is 36126720, while the sum is 63.

The spelling of 16283718725481 in words is "sixteen trillion, two hundred eighty-three billion, seven hundred eighteen million, seven hundred twenty-five thousand, four hundred eighty-one".