3645642349 has 2 divisors, whose sum is σ = 3645642350. Its totient is φ = 3645642348.

The previous prime is 3645642317. The next prime is 3645642353. The reversal of 3645642349 is 9432465463.

3645642349 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2219069449 + 1426572900 = 47107^2 + 37770^2 .

It is a cyclic number.

It is not a de Polignac number, because 3645642349 - 2⁵ = 3645642317 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3645642299 and 3645642308.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3645642379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1822821174 + 1822821175.

It is an arithmetic number, because the mean of its divisors is an integer number (1822821175).

Almost surely, 2^3645642349 is an apocalyptic number.

It is an amenable number.

3645642349 is a deficient number, since it is larger than the sum of its proper divisors (1).

3645642349 is an equidigital number, since it uses as much as digits as its factorization.

3645642349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1866240, while the sum is 46.

The square root of 3645642349 is about 60379.1549212143. The cubic root of 3645642349 is about 1539.0687501014.

The spelling of 3645642349 in words is "three billion, six hundred forty-five million, six hundred forty-two thousand, three hundred forty-nine".