671853930029567 has 2 divisors, whose sum is σ = 671853930029568. Its totient is φ = 671853930029566.

The previous prime is 671853930029549. The next prime is 671853930029593. The reversal of 671853930029567 is 765920039358176.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 671853930029567 - 2²⁴ = 671853913252351 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 671853930029567.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (671853930029537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335926965014783 + 335926965014784.

It is an arithmetic number, because the mean of its divisors is an integer number (335926965014784).

Almost surely, 2^{671853930029567} is an apocalyptic number.

671853930029567 is a deficient number, since it is larger than the sum of its proper divisors (1).

671853930029567 is an equidigital number, since it uses as much as digits as its factorization.

671853930029567 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 514382400, while the sum is 71.

The spelling of 671853930029567 in words is "six hundred seventy-one trillion, eight hundred fifty-three billion, nine hundred thirty million, twenty-nine thousand, five hundred sixty-seven".