3643405563 has 16 divisors (see below), whose sum is σ = 5558595840. Its totient is φ = 2079418656.

The previous prime is 3643405531. The next prime is 3643405627. The reversal of 3643405563 is 3655043463.

It is not a de Polignac number, because 3643405563 - 2⁵ = 3643405531 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3643405063) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87528 + ... + 122261.

It is an arithmetic number, because the mean of its divisors is an integer number (347412240).

Almost surely, 2^3643405563 is an apocalyptic number.

3643405563 is a deficient number, since it is larger than the sum of its proper divisors (1915190277).

3643405563 is a wasteful number, since it uses less digits than its factorization.

3643405563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210626.

The product of its (nonzero) digits is 388800, while the sum is 39.

The square root of 3643405563 is about 60360.6292462231. The cubic root of 3643405563 is about 1538.7539201934.

Subtracting 3643405563 from its reverse (3655043463), we obtain a triangular number (11637900 = T₄₈₂₄).

The spelling of 3643405563 in words is "three billion, six hundred forty-three million, four hundred five thousand, five hundred sixty-three".