40621791841 has 2 divisors, whose sum is σ = 40621791842. Its totient is φ = 40621791840.

The previous prime is 40621791829. The next prime is 40621791853. The reversal of 40621791841 is 14819712604.

It is a balanced prime because it is at equal distance from previous prime (40621791829) and next prime (40621791853).

It can be written as a sum of positive squares in only one way, i.e., 29749350400 + 10872441441 = 172480^2 + 104271^2 .

It is a cyclic number.

It is not a de Polignac number, because 40621791841 - 2¹⁹ = 40621267553 is a prime.

It is not a weakly prime, because it can be changed into another prime (40621791871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20310895920 + 20310895921.

It is an arithmetic number, because the mean of its divisors is an integer number (20310895921).

Almost surely, 2^40621791841 is an apocalyptic number.

It is an amenable number.

40621791841 is a deficient number, since it is larger than the sum of its proper divisors (1).

40621791841 is an equidigital number, since it uses as much as digits as its factorization.

40621791841 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96768, while the sum is 43.

The spelling of 40621791841 in words is "forty billion, six hundred twenty-one million, seven hundred ninety-one thousand, eight hundred forty-one".