1644032413 has 8 divisors (see below), whose sum is σ = 1741195008. Its totient is φ = 1546920384.

The previous prime is 1644032407. The next prime is 1644032441. The reversal of 1644032413 is 3142304461.

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 1644032413 - 2⁵ = 1644032381 is a prime.

It is a super-3 number, since 3×1644032413³ (a number of 29 digits) contains 333 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 (1644032443) 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, 69670 + ... + 90232.

It is an arithmetic number, because the mean of its divisors is an integer number (217649376).

Almost surely, 2^1644032413 is an apocalyptic number.

It is an amenable number.

1644032413 is a deficient number, since it is larger than the sum of its proper divisors (97162595).

1644032413 is a wasteful number, since it uses less digits than its factorization.

1644032413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25283.

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 1644032413 is about 40546.6695673023. The cubic root of 1644032413 is about 1180.2394450886.

Adding to 1644032413 its reverse (3142304461), we get a palindrome (4786336874).

The spelling of 1644032413 in words is "one billion, six hundred forty-four million, thirty-two thousand, four hundred thirteen".