16489780145 has 4 divisors (see below), whose sum is σ = 19787736180. Its totient is φ = 13191824112.

The previous prime is 16489780133. The next prime is 16489780157. The reversal of 16489780145 is 54108798461.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (16489780133) and next prime (16489780157).

It can be written as a sum of positive squares in 2 ways, for example, as 11043487744 + 5446292401 = 105088^2 + 73799^2 .

It is a cyclic number.

It is not a de Polignac number, because 16489780145 - 2¹⁰ = 16489779121 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1648978010 + ... + 1648978019.

It is an arithmetic number, because the mean of its divisors is an integer number (4946934045).

Almost surely, 2^16489780145 is an apocalyptic number.

It is an amenable number.

16489780145 is a deficient number, since it is larger than the sum of its proper divisors (3297956035).

16489780145 is an equidigital number, since it uses as much as digits as its factorization.

16489780145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3297956034.

The product of its (nonzero) digits is 1935360, while the sum is 53.

The spelling of 16489780145 in words is "sixteen billion, four hundred eighty-nine million, seven hundred eighty thousand, one hundred forty-five".