40663448657941 has 2 divisors, whose sum is σ = 40663448657942. Its totient is φ = 40663448657940.

The previous prime is 40663448657911. The next prime is 40663448658031. The reversal of 40663448657941 is 14975684436604.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31039617685041 + 9623830972900 = 5571321^2 + 3102230^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40663448657941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40663448657911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20331724328970 + 20331724328971.

It is an arithmetic number, because the mean of its divisors is an integer number (20331724328971).

Almost surely, 2^{40663448657941} is an apocalyptic number.

It is an amenable number.

40663448657941 is a deficient number, since it is larger than the sum of its proper divisors (1).

40663448657941 is an equidigital number, since it uses as much as digits as its factorization.

40663448657941 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 418037760, while the sum is 67.

The spelling of 40663448657941 in words is "forty trillion, six hundred sixty-three billion, four hundred forty-eight million, six hundred fifty-seven thousand, nine hundred forty-one".