16484858581 has 2 divisors, whose sum is σ = 16484858582. Its totient is φ = 16484858580.

The previous prime is 16484858539. The next prime is 16484858647. The reversal of 16484858581 is 18585848461.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8465656081 + 8019202500 = 92009^2 + 89550^2 .

It is a cyclic number.

It is not a de Polignac number, because 16484858581 - 2¹⁵ = 16484825813 is a prime.

It is a super-2 number, since 2×16484858581² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16484852581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8242429290 + 8242429291.

It is an arithmetic number, because the mean of its divisors is an integer number (8242429291).

Almost surely, 2^16484858581 is an apocalyptic number.

It is an amenable number.

16484858581 is a deficient number, since it is larger than the sum of its proper divisors (1).

16484858581 is an equidigital number, since it uses as much as digits as its factorization.

16484858581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9830400, while the sum is 58.

The spelling of 16484858581 in words is "sixteen billion, four hundred eighty-four million, eight hundred fifty-eight thousand, five hundred eighty-one".