67862141855821 has 2 divisors, whose sum is σ = 67862141855822. Its totient is φ = 67862141855820.

The previous prime is 67862141855789. The next prime is 67862141855839. The reversal of 67862141855821 is 12855814126876.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67666500181225 + 195641674596 = 8225965^2 + 442314^2 .

It is a cyclic number.

It is not a de Polignac number, because 67862141855821 - 2⁵ = 67862141855789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67862141855881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33931070927910 + 33931070927911.

It is an arithmetic number, because the mean of its divisors is an integer number (33931070927911).

Almost surely, 2^{67862141855821} is an apocalyptic number.

It is an amenable number.

67862141855821 is a deficient number, since it is larger than the sum of its proper divisors (1).

67862141855821 is an equidigital number, since it uses as much as digits as its factorization.

67862141855821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51609600, while the sum is 64.

The spelling of 67862141855821 in words is "sixty-seven trillion, eight hundred sixty-two billion, one hundred forty-one million, eight hundred fifty-five thousand, eight hundred twenty-one".