1644130264 has 32 divisors (see below), whose sum is σ = 3525350400. Its totient is φ = 704184480.

The previous prime is 1644130259. The next prime is 1644130277. The reversal of 1644130264 is 4620314461.

It is a super-3 number, since 3×1644130264³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90159 + ... + 106849.

It is an arithmetic number, because the mean of its divisors is an integer number (110167200).

Almost surely, 2^1644130264 is an apocalyptic number.

1644130264 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1644130264 is an abundant number, since it is smaller than the sum of its proper divisors (1881220136).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1644130264 is a wasteful number, since it uses less digits than its factorization.

1644130264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18463 (or 18459 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 1644130264 is about 40547.8761959242. The cubic root of 1644130264 is about 1180.2628601417.

The spelling of 1644130264 in words is "one billion, six hundred forty-four million, one hundred thirty thousand, two hundred sixty-four".