1659871319149 has 4 divisors (see below), whose sum is σ = 1678521558780. Its totient is φ = 1641221079520.

The previous prime is 1659871319123. The next prime is 1659871319167. The reversal of 1659871319149 is 9419131789561.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 809427701124 + 850443618025 = 899682^2 + 922195^2 .

It is a cyclic number.

It is not a de Polignac number, because 1659871319149 - 2¹⁹ = 1659870794861 is a prime.

It is a super-2 number, since 2×1659871319149² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1659871319179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9325119682 + ... + 9325119859.

It is an arithmetic number, because the mean of its divisors is an integer number (419630389695).

Almost surely, 2^{1659871319149} is an apocalyptic number.

It is an amenable number.

1659871319149 is a deficient number, since it is larger than the sum of its proper divisors (18650239631).

1659871319149 is an equidigital number, since it uses as much as digits as its factorization.

1659871319149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18650239630.

The product of its digits is 14696640, while the sum is 64.

The spelling of 1659871319149 in words is "one trillion, six hundred fifty-nine billion, eight hundred seventy-one million, three hundred nineteen thousand, one hundred forty-nine".