1680629851 has 2 divisors, whose sum is σ = 1680629852. Its totient is φ = 1680629850.

The previous prime is 1680629831. The next prime is 1680629969. The reversal of 1680629851 is 1589260861.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1680629851 - 2¹⁷ = 1680498779 is a prime.

It is not a weakly prime, because it can be changed into another prime (1680629801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 840314925 + 840314926.

It is an arithmetic number, because the mean of its divisors is an integer number (840314926).

Almost surely, 2^1680629851 is an apocalyptic number.

1680629851 is a deficient number, since it is larger than the sum of its proper divisors (1).

1680629851 is an equidigital number, since it uses as much as digits as its factorization.

1680629851 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 207360, while the sum is 46.

The square root of 1680629851 is about 40995.4857392860. The cubic root of 1680629851 is about 1188.9329348947.

The spelling of 1680629851 in words is "one billion, six hundred eighty million, six hundred twenty-nine thousand, eight hundred fifty-one".