1644167132 has 12 divisors (see below), whose sum is σ = 2909622240. Its totient is φ = 812846496.

The previous prime is 1644167081. The next prime is 1644167159. The reversal of 1644167132 is 2317614461.

It is a super-3 number, since 3×1644167132³ (a number of 29 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1644167092 and 1644167101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2308868 + ... + 2309579.

It is an arithmetic number, because the mean of its divisors is an integer number (242468520).

Almost surely, 2^1644167132 is an apocalyptic number.

It is an amenable number.

1644167132 is a deficient number, since it is larger than the sum of its proper divisors (1265455108).

1644167132 is a wasteful number, since it uses less digits than its factorization.

1644167132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4618540 (or 4618538 counting only the distinct ones).

The product of its digits is 24192, while the sum is 35.

The square root of 1644167132 is about 40548.3308164467. The cubic root of 1644167132 is about 1180.2716821527.

The spelling of 1644167132 in words is "one billion, six hundred forty-four million, one hundred sixty-seven thousand, one hundred thirty-two".