671287478222 has 4 divisors (see below), whose sum is σ = 1006931217336. Its totient is φ = 335643739110.

The previous prime is 671287478221. The next prime is 671287478249. The reversal of 671287478222 is 222874782176.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671287478221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 167821869554 + ... + 167821869557.

It is an arithmetic number, because the mean of its divisors is an integer number (251732804334).

Almost surely, 2^671287478222 is an apocalyptic number.

671287478222 is a deficient number, since it is larger than the sum of its proper divisors (335643739114).

671287478222 is a wasteful number, since it uses less digits than its factorization.

671287478222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335643739113.

The product of its digits is 8429568, while the sum is 56.

The spelling of 671287478222 in words is "six hundred seventy-one billion, two hundred eighty-seven million, four hundred seventy-eight thousand, two hundred twenty-two".