3712821861659 has 2 divisors, whose sum is σ = 3712821861660. Its totient is φ = 3712821861658.

The previous prime is 3712821861569. The next prime is 3712821861703. The reversal of 3712821861659 is 9561681282173.

Together with previous prime (3712821861569) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3712821861659 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 3712821861598 and 3712821861607.

It is not a weakly prime, because it can be changed into another prime (3712821861559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1856410930829 + 1856410930830.

It is an arithmetic number, because the mean of its divisors is an integer number (1856410930830).

Almost surely, 2^{3712821861659} is an apocalyptic number.

3712821861659 is a deficient number, since it is larger than the sum of its proper divisors (1).

3712821861659 is an equidigital number, since it uses as much as digits as its factorization.

3712821861659 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8709120, while the sum is 59.

The spelling of 3712821861659 in words is "three trillion, seven hundred twelve billion, eight hundred twenty-one million, eight hundred sixty-one thousand, six hundred fifty-nine".