41664021851 has 2 divisors, whose sum is σ = 41664021852. Its totient is φ = 41664021850.

The previous prime is 41664021823. The next prime is 41664021857. The reversal of 41664021851 is 15812046614.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-41664021851 is a prime.

It is not a weakly prime, because it can be changed into another prime (41664021857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20832010925 + 20832010926.

It is an arithmetic number, because the mean of its divisors is an integer number (20832010926).

Almost surely, 2^41664021851 is an apocalyptic number.

41664021851 is a deficient number, since it is larger than the sum of its proper divisors (1).

41664021851 is an equidigital number, since it uses as much as digits as its factorization.

41664021851 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46080, while the sum is 38.

The spelling of 41664021851 in words is "forty-one billion, six hundred sixty-four million, twenty-one thousand, eight hundred fifty-one".