671317763545453 has 4 divisors (see below), whose sum is σ = 677964474075708. Its totient is φ = 664671053015200.

The previous prime is 671317763545439. The next prime is 671317763545489. The reversal of 671317763545453 is 354545367713176.

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

It can be written as a sum of positive squares in 2 ways, for example, as 483608391245604 + 187709372299849 = 21991098^2 + 13700707^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-671317763545453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671317763545753) 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, 3323355264976 + ... + 3323355265177.

It is an arithmetic number, because the mean of its divisors is an integer number (169491118518927).

Almost surely, 2^{671317763545453} is an apocalyptic number.

It is an amenable number.

671317763545453 is a deficient number, since it is larger than the sum of its proper divisors (6646710530255).

671317763545453 is a wasteful number, since it uses less digits than its factorization.

671317763545453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6646710530254.

The product of its digits is 666792000, while the sum is 67.

The spelling of 671317763545453 in words is "six hundred seventy-one trillion, three hundred seventeen billion, seven hundred sixty-three million, five hundred forty-five thousand, four hundred fifty-three".