1645375532 has 12 divisors (see below), whose sum is σ = 3048784200. Its totient is φ = 774294336.

The previous prime is 1645375451. The next prime is 1645375553. The reversal of 1645375532 is 2355735461.

It is a self number, because there is not a number n which added to its sum of digits gives 1645375532.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12098282 + ... + 12098417.

It is an arithmetic number, because the mean of its divisors is an integer number (254065350).

Almost surely, 2^1645375532 is an apocalyptic number.

It is an amenable number.

1645375532 is a deficient number, since it is larger than the sum of its proper divisors (1403408668).

1645375532 is a wasteful number, since it uses less digits than its factorization.

1645375532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24196720 (or 24196718 counting only the distinct ones).

The product of its digits is 378000, while the sum is 41.

The square root of 1645375532 is about 40563.2288162567. The cubic root of 1645375532 is about 1180.5607628682.

The spelling of 1645375532 in words is "one billion, six hundred forty-five million, three hundred seventy-five thousand, five hundred thirty-two".