630251646151991 has 2 divisors, whose sum is σ = 630251646151992. Its totient is φ = 630251646151990.

The previous prime is 630251646151957. The next prime is 630251646152041. The reversal of 630251646151991 is 199151646152036.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-630251646151991 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 630251646151991.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (630251646151901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315125823075995 + 315125823075996.

It is an arithmetic number, because the mean of its divisors is an integer number (315125823075996).

Almost surely, 2^{630251646151991} is an apocalyptic number.

630251646151991 is a deficient number, since it is larger than the sum of its proper divisors (1).

630251646151991 is an equidigital number, since it uses as much as digits as its factorization.

630251646151991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10497600, while the sum is 59.

The spelling of 630251646151991 in words is "six hundred thirty trillion, two hundred fifty-one billion, six hundred forty-six million, one hundred fifty-one thousand, nine hundred ninety-one".