1645560452 has 24 divisors (see below), whose sum is σ = 2933952000. Its totient is φ = 807402816.

The previous prime is 1645560451. The next prime is 1645560467. The reversal of 1645560452 is 2540655461.

It is not an unprimeable number, because it can be changed into a prime (1645560451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43949 + ... + 72267.

It is an arithmetic number, because the mean of its divisors is an integer number (122248000).

Almost surely, 2^1645560452 is an apocalyptic number.

It is an amenable number.

1645560452 is a deficient number, since it is larger than the sum of its proper divisors (1288391548).

1645560452 is a wasteful number, since it uses less digits than its factorization.

1645560452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28595 (or 28593 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 38.

The square root of 1645560452 is about 40565.5081565608. The cubic root of 1645560452 is about 1180.6049880545.

The spelling of 1645560452 in words is "one billion, six hundred forty-five million, five hundred sixty thousand, four hundred fifty-two".