1645132012 has 24 divisors (see below), whose sum is σ = 2947988736. Its totient is φ = 802876368.

The previous prime is 1645132009. The next prime is 1645132037. The reversal of 1645132012 is 2102315461.

It is a happy 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, 356673 + ... + 361255.

It is an arithmetic number, because the mean of its divisors is an integer number (122832864).

Almost surely, 2^1645132012 is an apocalyptic number.

It is an amenable number.

1645132012 is a deficient number, since it is larger than the sum of its proper divisors (1302856724).

1645132012 is a wasteful number, since it uses less digits than its factorization.

1645132012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6717 (or 6715 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 1645132012 is about 40560.2269717515. The cubic root of 1645132012 is about 1180.5025179396.

Adding to 1645132012 its reverse (2102315461), we get a palindrome (3747447473).

The spelling of 1645132012 in words is "one billion, six hundred forty-five million, one hundred thirty-two thousand, twelve".