3645563641 has 8 divisors (see below), whose sum is σ = 3805190784. Its totient is φ = 3486030240.

The previous prime is 3645563633. The next prime is 3645563653. The reversal of 3645563641 is 1463655463.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3645563641 - 2³ = 3645563633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3645566641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62845 + ... + 106021.

It is an arithmetic number, because the mean of its divisors is an integer number (475648848).

Almost surely, 2^3645563641 is an apocalyptic number.

It is an amenable number.

3645563641 is a deficient number, since it is larger than the sum of its proper divisors (159627143).

3645563641 is a wasteful number, since it uses less digits than its factorization.

3645563641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46871.

The product of its digits is 777600, while the sum is 43.

The square root of 3645563641 is about 60378.5031364641. The cubic root of 3645563641 is about 1539.0576740566.

The spelling of 3645563641 in words is "three billion, six hundred forty-five million, five hundred sixty-three thousand, six hundred forty-one".