643167349764 has 24 divisors (see below), whose sum is σ = 1501525109280. Its totient is φ = 214274646144.

The previous prime is 643167349723. The next prime is 643167349787. The reversal of 643167349764 is 467943761346.

643167349764 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 3×643167349764³ (a number of 36 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 643167349698 and 643167349707.

It is an unprimeable number.

It is an upside-down number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14285394 + ... + 14330345.

It is an arithmetic number, because the mean of its divisors is an integer number (62563546220).

Almost surely, 2^643167349764 is an apocalyptic number.

It is an amenable number.

643167349764 is an abundant number, since it is smaller than the sum of its proper divisors (858357759516).

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

643167349764 is a wasteful number, since it uses less digits than its factorization.

643167349764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28617619 (or 28617617 counting only the distinct ones).

The product of its digits is 54867456, while the sum is 60.

The spelling of 643167349764 in words is "six hundred forty-three billion, one hundred sixty-seven million, three hundred forty-nine thousand, seven hundred sixty-four".