671763678463 has 4 divisors (see below), whose sum is σ = 707119661560. Its totient is φ = 636407695368.

The previous prime is 671763678431. The next prime is 671763678479. The reversal of 671763678463 is 364876367176.

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

It is a cyclic number.

It is not a de Polignac number, because 671763678463 - 2⁵ = 671763678431 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 671763678395 and 671763678404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671763678403) 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, 17677991520 + ... + 17677991557.

It is an arithmetic number, because the mean of its divisors is an integer number (176779915390).

Almost surely, 2^671763678463 is an apocalyptic number.

671763678463 is a deficient number, since it is larger than the sum of its proper divisors (35355983097).

671763678463 is a wasteful number, since it uses less digits than its factorization.

671763678463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35355983096.

The product of its digits is 128024064, while the sum is 64.

The spelling of 671763678463 in words is "six hundred seventy-one billion, seven hundred sixty-three million, six hundred seventy-eight thousand, four hundred sixty-three".