671624415851 has 2 divisors, whose sum is σ = 671624415852. Its totient is φ = 671624415850.

The previous prime is 671624415779. The next prime is 671624415859. The reversal of 671624415851 is 158514426176.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-671624415851 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 671624415851.

It is not a weakly prime, because it can be changed into another prime (671624415859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335812207925 + 335812207926.

It is an arithmetic number, because the mean of its divisors is an integer number (335812207926).

Almost surely, 2^671624415851 is an apocalyptic number.

671624415851 is a deficient number, since it is larger than the sum of its proper divisors (1).

671624415851 is an equidigital number, since it uses as much as digits as its factorization.

671624415851 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1612800, while the sum is 50.

The spelling of 671624415851 in words is "six hundred seventy-one billion, six hundred twenty-four million, four hundred fifteen thousand, eight hundred fifty-one".