41542991849 has 2 divisors, whose sum is σ = 41542991850. Its totient is φ = 41542991848.

The previous prime is 41542991843. The next prime is 41542991863. The reversal of 41542991849 is 94819924514.

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., 40776532624 + 766459225 = 201932^2 + 27685^2 .

It is a cyclic number.

It is not a de Polignac number, because 41542991849 - 2¹² = 41542987753 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 41542991794 and 41542991803.

It is not a weakly prime, because it can be changed into another prime (41542991843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20771495924 + 20771495925.

It is an arithmetic number, because the mean of its divisors is an integer number (20771495925).

Almost surely, 2^41542991849 is an apocalyptic number.

It is an amenable number.

41542991849 is a deficient number, since it is larger than the sum of its proper divisors (1).

41542991849 is an equidigital number, since it uses as much as digits as its factorization.

41542991849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3732480, while the sum is 56.

The spelling of 41542991849 in words is "forty-one billion, five hundred forty-two million, nine hundred ninety-one thousand, eight hundred forty-nine".