643374607276 has 12 divisors (see below), whose sum is σ = 1174857978672. Its totient is φ = 307700899088.

The previous prime is 643374607273. The next prime is 643374607289. The reversal of 643374607276 is 672706473346.

It is not an unprimeable number, because it can be changed into a prime (643374607273) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3496601035 + ... + 3496601218.

It is an arithmetic number, because the mean of its divisors is an integer number (97904831556).

Almost surely, 2^643374607276 is an apocalyptic number.

It is an amenable number.

643374607276 is a deficient number, since it is larger than the sum of its proper divisors (531483371396).

643374607276 is a wasteful number, since it uses less digits than its factorization.

643374607276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6993202280 (or 6993202278 counting only the distinct ones).

The product of its (nonzero) digits is 21337344, while the sum is 55.

The spelling of 643374607276 in words is "six hundred forty-three billion, three hundred seventy-four million, six hundred seven thousand, two hundred seventy-six".