1840153117 has 12 divisors (see below), whose sum is σ = 2141629308. Its totient is φ = 1574460800.

The previous prime is 1840153109. The next prime is 1840153187. The reversal of 1840153117 is 7113510481.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 912402436 + 927750681 = 30206^2 + 30459^2 .

It is not a de Polignac number, because 1840153117 - 2³ = 1840153109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1840153187) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 445234 + ... + 449347.

It is an arithmetic number, because the mean of its divisors is an integer number (178469109).

Almost surely, 2^1840153117 is an apocalyptic number.

1840153117 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1840153117 is a deficient number, since it is larger than the sum of its proper divisors (301476191).

1840153117 is a wasteful number, since it uses less digits than its factorization.

1840153117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 894620 (or 894609 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 31.

The square root of 1840153117 is about 42897.0059211596. The cubic root of 1840153117 is about 1225.4191245550.

Adding to 1840153117 its reverse (7113510481), we get a palindrome (8953663598).

The spelling of 1840153117 in words is "one billion, eight hundred forty million, one hundred fifty-three thousand, one hundred seventeen".