5861811840421 has 2 divisors, whose sum is σ = 5861811840422. Its totient is φ = 5861811840420.

The previous prime is 5861811840419. The next prime is 5861811840457. The reversal of 5861811840421 is 1240481181685.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5776398855396 + 85412985025 = 2403414^2 + 292255^2 .

It is a cyclic number.

It is not a de Polignac number, because 5861811840421 - 2¹ = 5861811840419 is a prime.

Together with 5861811840419, 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 (5861811840491) 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, 2930905920210 + 2930905920211.

It is an arithmetic number, because the mean of its divisors is an integer number (2930905920211).

Almost surely, 2^{5861811840421} is an apocalyptic number.

It is an amenable number.

5861811840421 is a deficient number, since it is larger than the sum of its proper divisors (1).

5861811840421 is an equidigital number, since it uses as much as digits as its factorization.

5861811840421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 491520, while the sum is 49.

The spelling of 5861811840421 in words is "five trillion, eight hundred sixty-one billion, eight hundred eleven million, eight hundred forty thousand, four hundred twenty-one".