47643981841 has 2 divisors, whose sum is σ = 47643981842. Its totient is φ = 47643981840.

The previous prime is 47643981799. The next prime is 47643981851. The reversal of 47643981841 is 14818934674.

47643981841 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31935119616 + 15708862225 = 178704^2 + 125335^2 .

It is a cyclic number.

It is not a de Polignac number, because 47643981841 - 2¹¹ = 47643979793 is a prime.

It is not a weakly prime, because it can be changed into another prime (47643981851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23821990920 + 23821990921.

It is an arithmetic number, because the mean of its divisors is an integer number (23821990921).

Almost surely, 2^47643981841 is an apocalyptic number.

It is an amenable number.

47643981841 is a deficient number, since it is larger than the sum of its proper divisors (1).

47643981841 is an equidigital number, since it uses as much as digits as its factorization.

47643981841 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4644864, while the sum is 55.

The spelling of 47643981841 in words is "forty-seven billion, six hundred forty-three million, nine hundred eighty-one thousand, eight hundred forty-one".