1645522052 has 6 divisors (see below), whose sum is σ = 2879663598. Its totient is φ = 822761024.

The previous prime is 1645522033. The next prime is 1645522063. The reversal of 1645522052 is 2502255461.

It can be written as a sum of positive squares in only one way, i.e., 1439140096 + 206381956 = 37936^2 + 14366^2 .

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 as a sum of consecutive naturals, namely, 205690253 + ... + 205690260.

It is an arithmetic number, because the mean of its divisors is an integer number (479943933).

Almost surely, 2^1645522052 is an apocalyptic number.

It is an amenable number.

1645522052 is a deficient number, since it is larger than the sum of its proper divisors (1234141546).

1645522052 is a wasteful number, since it uses less digits than its factorization.

1645522052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411380517 (or 411380515 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 32.

The square root of 1645522052 is about 40565.0348452950. The cubic root of 1645522052 is about 1180.5958046414.

The spelling of 1645522052 in words is "one billion, six hundred forty-five million, five hundred twenty-two thousand, fifty-two".