643282113786 has 16 divisors (see below), whose sum is σ = 1385530706784. Its totient is φ = 197932958064.

The previous prime is 643282113641. The next prime is 643282113787. The reversal of 643282113786 is 687311282346.

It is a happy number.

643282113786 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×643282113786³ (a number of 36 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (643282113787) 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, 4123603216 + ... + 4123603371.

It is an arithmetic number, because the mean of its divisors is an integer number (86595669174).

Almost surely, 2^643282113786 is an apocalyptic number.

643282113786 is an abundant number, since it is smaller than the sum of its proper divisors (742248592998).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

643282113786 is a wasteful number, since it uses less digits than its factorization.

643282113786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8247206605.

The product of its digits is 2322432, while the sum is 51.

The spelling of 643282113786 in words is "six hundred forty-three billion, two hundred eighty-two million, one hundred thirteen thousand, seven hundred eighty-six".