41386809857 has 2 divisors, whose sum is σ = 41386809858. Its totient is φ = 41386809856.

The previous prime is 41386809853. The next prime is 41386809889. The reversal of 41386809857 is 75890868314.

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., 35737633936 + 5649175921 = 189044^2 + 75161^2 .

It is a cyclic number.

It is not a de Polignac number, because 41386809857 - 2² = 41386809853 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 41386809796 and 41386809805.

It is not a weakly prime, because it can be changed into another prime (41386809853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20693404928 + 20693404929.

It is an arithmetic number, because the mean of its divisors is an integer number (20693404929).

Almost surely, 2^41386809857 is an apocalyptic number.

It is an amenable number.

41386809857 is a deficient number, since it is larger than the sum of its proper divisors (1).

41386809857 is an equidigital number, since it uses as much as digits as its factorization.

41386809857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11612160, while the sum is 59.

The spelling of 41386809857 in words is "forty-one billion, three hundred eighty-six million, eight hundred nine thousand, eight hundred fifty-seven".