671267568565 has 8 divisors (see below), whose sum is σ = 878750271648. Its totient is φ = 488194595280.

The previous prime is 671267568563. The next prime is 671267568577. The reversal of 671267568565 is 565865762176.

It is a happy number.

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

It is not a de Polignac number, because 671267568565 - 2¹ = 671267568563 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 671267568497 and 671267568506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671267568563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6102432387 + ... + 6102432496.

It is an arithmetic number, because the mean of its divisors is an integer number (109843783956).

Almost surely, 2^671267568565 is an apocalyptic number.

It is an amenable number.

671267568565 is a deficient number, since it is larger than the sum of its proper divisors (207482703083).

671267568565 is a wasteful number, since it uses less digits than its factorization.

671267568565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12204864899.

The product of its digits is 127008000, while the sum is 64.

The spelling of 671267568565 in words is "six hundred seventy-one billion, two hundred sixty-seven million, five hundred sixty-eight thousand, five hundred sixty-five".