40640663611 has 2 divisors, whose sum is σ = 40640663612. Its totient is φ = 40640663610.

The previous prime is 40640663551. The next prime is 40640663629. The reversal of 40640663611 is 11636604604.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40640663611 - 2⁹ = 40640663099 is a prime.

It is not a weakly prime, because it can be changed into another prime (40640663311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20320331805 + 20320331806.

It is an arithmetic number, because the mean of its divisors is an integer number (20320331806).

Almost surely, 2^40640663611 is an apocalyptic number.

40640663611 is a deficient number, since it is larger than the sum of its proper divisors (1).

40640663611 is an equidigital number, since it uses as much as digits as its factorization.

40640663611 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 37.

The spelling of 40640663611 in words is "forty billion, six hundred forty million, six hundred sixty-three thousand, six hundred eleven".