3645645237 has 24 divisors (see below), whose sum is σ = 5704992384. Its totient is φ = 2230028064.

The previous prime is 3645645169. The next prime is 3645645239. The reversal of 3645645237 is 7325465463.

3645645237 is a `hidden beast` number, since 3 + 6 + 4 + 564 + 52 + 37 = 666.

It is not a de Polignac number, because 3645645237 - 2¹⁰ = 3645644213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3645645192 and 3645645201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3645645239) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 73753 + ... + 112830.

It is an arithmetic number, because the mean of its divisors is an integer number (237708016).

Almost surely, 2^3645645237 is an apocalyptic number.

It is an amenable number.

3645645237 is a deficient number, since it is larger than the sum of its proper divisors (2059347147).

3645645237 is a wasteful number, since it uses less digits than its factorization.

3645645237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186769 (or 186766 counting only the distinct ones).

The product of its digits is 1814400, while the sum is 45.

The square root of 3645645237 is about 60379.1788367480. The cubic root of 3645645237 is about 1539.0691565071.

The spelling of 3645645237 in words is "three billion, six hundred forty-five million, six hundred forty-five thousand, two hundred thirty-seven".