3645203445 has 64 divisors (see below), whose sum is σ = 6990896640. Its totient is φ = 1791465984.

The previous prime is 3645203399. The next prime is 3645203453. The reversal of 3645203445 is 5443025463.

3645203445 is a `hidden beast` number, since 3 + 6 + 4 + 5 + 203 + 445 = 666.

It is not a de Polignac number, because 3645203445 - 2¹⁸ = 3644941301 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1274457 + ... + 1277313.

It is an arithmetic number, because the mean of its divisors is an integer number (109232760).

Almost surely, 2^3645203445 is an apocalyptic number.

It is an amenable number.

3645203445 is a deficient number, since it is larger than the sum of its proper divisors (3345693195).

3645203445 is a wasteful number, since it uses less digits than its factorization.

3645203445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3611 (or 3605 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 36.

The square root of 3645203445 is about 60375.5202462057. The cubic root of 3645203445 is about 1539.0069840736.

The spelling of 3645203445 in words is "three billion, six hundred forty-five million, two hundred three thousand, four hundred forty-five".