671347836218 has 32 divisors (see below), whose sum is σ = 1053971493264. Its totient is φ = 320372762112.

The previous prime is 671347836193. The next prime is 671347836227. The reversal of 671347836218 is 812638743176.

It is a happy number.

671347836218 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 149345921209 + 522001915009 = 386453^2 + 722497^2 .

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, 22485596 + ... + 22515432.

Almost surely, 2^671347836218 is an apocalyptic number.

671347836218 is a deficient number, since it is larger than the sum of its proper divisors (382623657046).

671347836218 is a wasteful number, since it uses less digits than its factorization.

671347836218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35666.

The product of its digits is 8128512, while the sum is 56.

The spelling of 671347836218 in words is "six hundred seventy-one billion, three hundred forty-seven million, eight hundred thirty-six thousand, two hundred eighteen".