1645132332 has 48 divisors (see below), whose sum is σ = 3948184800. Its totient is φ = 532772352.

The previous prime is 1645132297. The next prime is 1645132351. The reversal of 1645132332 is 2332315461.

It is a self number, because there is not a number n which added to its sum of digits gives 1645132332.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 351544 + ... + 356192.

It is an arithmetic number, because the mean of its divisors is an integer number (82253850).

Almost surely, 2^1645132332 is an apocalyptic number.

1645132332 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1645132332 is an abundant number, since it is smaller than the sum of its proper divisors (2303052468).

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

1645132332 is a wasteful number, since it uses less digits than its factorization.

1645132332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5490 (or 5488 counting only the distinct ones).

The product of its digits is 12960, while the sum is 30.

The square root of 1645132332 is about 40560.2309165024. The cubic root of 1645132332 is about 1180.5025944807.

Adding to 1645132332 its reverse (2332315461), we get a palindrome (3977447793).

The spelling of 1645132332 in words is "one billion, six hundred forty-five million, one hundred thirty-two thousand, three hundred thirty-two".