40999981241 has 2 divisors, whose sum is σ = 40999981242. Its totient is φ = 40999981240.

The previous prime is 40999981229. The next prime is 40999981247. The reversal of 40999981241 is 14218999904.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38449327225 + 2550654016 = 196085^2 + 50504^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40999981241 is a prime.

It is not a weakly prime, because it can be changed into another prime (40999981247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20499990620 + 20499990621.

It is an arithmetic number, because the mean of its divisors is an integer number (20499990621).

Almost surely, 2^40999981241 is an apocalyptic number.

It is an amenable number.

40999981241 is a deficient number, since it is larger than the sum of its proper divisors (1).

40999981241 is an equidigital number, since it uses as much as digits as its factorization.

40999981241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1679616, while the sum is 56.

The spelling of 40999981241 in words is "forty billion, nine hundred ninety-nine million, nine hundred eighty-one thousand, two hundred forty-one".