41993129861 has 2 divisors, whose sum is σ = 41993129862. Its totient is φ = 41993129860.

The previous prime is 41993129779. The next prime is 41993129933. The reversal of 41993129861 is 16892139914.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33007985761 + 8985144100 = 181681^2 + 94790^2 .

It is a cyclic number.

It is not a de Polignac number, because 41993129861 - 2²² = 41988935557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (41993129461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20996564930 + 20996564931.

It is an arithmetic number, because the mean of its divisors is an integer number (20996564931).

Almost surely, 2^41993129861 is an apocalyptic number.

It is an amenable number.

41993129861 is a deficient number, since it is larger than the sum of its proper divisors (1).

41993129861 is an equidigital number, since it uses as much as digits as its factorization.

41993129861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 839808, while the sum is 53.

The spelling of 41993129861 in words is "forty-one billion, nine hundred ninety-three million, one hundred twenty-nine thousand, eight hundred sixty-one".