643283587413 has 6 divisors (see below), whose sum is σ = 929187404054. Its totient is φ = 428855724936.

The previous prime is 643283587399. The next prime is 643283587439. The reversal of 643283587413 is 314785382346.

It is a happy number.

643283587413 is a `hidden beast` number, since 6 + 43 + 2 + 8 + 3 + 587 + 4 + 13 = 666.

It can be written as a sum of positive squares in only one way, i.e., 500503896369 + 142779691044 = 707463^2 + 377862^2 .

It is not a de Polignac number, because 643283587413 - 2⁹ = 643283586901 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 643283587413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643283589413) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 35737977070 + ... + 35737977087.

Almost surely, 2^643283587413 is an apocalyptic number.

It is an amenable number.

643283587413 is a deficient number, since it is larger than the sum of its proper divisors (285903816641).

643283587413 is a wasteful number, since it uses less digits than its factorization.

643283587413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71475954163 (or 71475954160 counting only the distinct ones).

The product of its digits is 11612160, while the sum is 54.

The spelling of 643283587413 in words is "six hundred forty-three billion, two hundred eighty-three million, five hundred eighty-seven thousand, four hundred thirteen".