3645625591 has 2 divisors, whose sum is σ = 3645625592. Its totient is φ = 3645625590.

The previous prime is 3645625579. The next prime is 3645625597. The reversal of 3645625591 is 1955265463.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3645625591 - 2¹⁵ = 3645592823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3645625597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1822812795 + 1822812796.

It is an arithmetic number, because the mean of its divisors is an integer number (1822812796).

Almost surely, 2^3645625591 is an apocalyptic number.

3645625591 is a deficient number, since it is larger than the sum of its proper divisors (1).

3645625591 is an equidigital number, since it uses as much as digits as its factorization.

3645625591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 972000, while the sum is 46.

The square root of 3645625591 is about 60379.0161479963. The cubic root of 3645625591 is about 1539.0663918747.

The spelling of 3645625591 in words is "three billion, six hundred forty-five million, six hundred twenty-five thousand, five hundred ninety-one".