7801836963421 has 2 divisors, whose sum is σ = 7801836963422. Its totient is φ = 7801836963420.

The previous prime is 7801836963419. The next prime is 7801836963493. The reversal of 7801836963421 is 1243696381087.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7311156327225 + 490680636196 = 2703915^2 + 700486^2 .

It is a cyclic number.

It is not a de Polignac number, because 7801836963421 - 2¹ = 7801836963419 is a prime.

Together with 7801836963419, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7801836961421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3900918481710 + 3900918481711.

It is an arithmetic number, because the mean of its divisors is an integer number (3900918481711).

Almost surely, 2^{7801836963421} is an apocalyptic number.

It is an amenable number.

7801836963421 is a deficient number, since it is larger than the sum of its proper divisors (1).

7801836963421 is an equidigital number, since it uses as much as digits as its factorization.

7801836963421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10450944, while the sum is 58.

The spelling of 7801836963421 in words is "seven trillion, eight hundred one billion, eight hundred thirty-six million, nine hundred sixty-three thousand, four hundred twenty-one".