643050045605 has 32 divisors (see below), whose sum is σ = 889530716160. Its totient is φ = 441676572480.

The previous prime is 643050045601. The next prime is 643050045611. The reversal of 643050045605 is 506540050346.

It is a happy number.

It is not a de Polignac number, because 643050045605 - 2² = 643050045601 is a prime.

It is a super-2 number, since 2×643050045605² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643050045601) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3117407 + ... + 3317276.

It is an arithmetic number, because the mean of its divisors is an integer number (27797834880).

Almost surely, 2^643050045605 is an apocalyptic number.

It is an amenable number.

643050045605 is a deficient number, since it is larger than the sum of its proper divisors (246480670555).

643050045605 is a wasteful number, since it uses less digits than its factorization.

643050045605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6434801.

The product of its (nonzero) digits is 216000, while the sum is 38.

The spelling of 643050045605 in words is "six hundred forty-three billion, fifty million, forty-five thousand, six hundred five".