643255433035 has 16 divisors (see below), whose sum is σ = 773033248800. Its totient is φ = 513853514496.

The previous prime is 643255432999. The next prime is 643255433059. The reversal of 643255433035 is 530334552346.

643255433035 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 643255433035 - 2¹⁷ = 643255301963 is a prime.

It is a super-2 number, since 2×643255433035² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 643255432982 and 643255433000.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18456856 + ... + 18491674.

It is an arithmetic number, because the mean of its divisors is an integer number (48314578050).

Almost surely, 2^643255433035 is an apocalyptic number.

643255433035 is a deficient number, since it is larger than the sum of its proper divisors (129777815765).

643255433035 is a wasteful number, since it uses less digits than its factorization.

643255433035 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40110.

The product of its (nonzero) digits is 1944000, while the sum is 43.

The spelling of 643255433035 in words is "six hundred forty-three billion, two hundred fifty-five million, four hundred thirty-three thousand, thirty-five".