671225201810 has 8 divisors (see below), whose sum is σ = 1208205363276. Its totient is φ = 268490080720.

The previous prime is 671225201807. The next prime is 671225201839. The reversal of 671225201810 is 18102522176.

It can be written as a sum of positive squares in 2 ways, for example, as 670487481889 + 737719921 = 818833^2 + 27161^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×671225201810² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33561260081 + ... + 33561260100.

Almost surely, 2^671225201810 is an apocalyptic number.

671225201810 is a deficient number, since it is larger than the sum of its proper divisors (536980161466).

671225201810 is a wasteful number, since it uses less digits than its factorization.

671225201810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67122520188.

The product of its (nonzero) digits is 13440, while the sum is 35.

Adding to 671225201810 its reverse (18102522176), we get a palindrome (689327723986).

The spelling of 671225201810 in words is "six hundred seventy-one billion, two hundred twenty-five million, two hundred one thousand, eight hundred ten".