1644132117 has 8 divisors (see below), whose sum is σ = 2197409760. Its totient is φ = 1093471280.

The previous prime is 1644132109. The next prime is 1644132131. The reversal of 1644132117 is 7112314461.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1644132117 - 2³ = 1644132109 is a prime.

It is a super-3 number, since 3×1644132117³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1644132167) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 652734 + ... + 655247.

It is an arithmetic number, because the mean of its divisors is an integer number (274676220).

Almost surely, 2^1644132117 is an apocalyptic number.

It is an amenable number.

1644132117 is a deficient number, since it is larger than the sum of its proper divisors (553277643).

1644132117 is a wasteful number, since it uses less digits than its factorization.

1644132117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1308403.

The product of its digits is 4032, while the sum is 30.

The square root of 1644132117 is about 40547.8990454499. The cubic root of 1644132117 is about 1180.2633035426.

Adding to 1644132117 its reverse (7112314461), we get a palindrome (8756446578).

The spelling of 1644132117 in words is "one billion, six hundred forty-four million, one hundred thirty-two thousand, one hundred seventeen".