40646506699 has 2 divisors, whose sum is σ = 40646506700. Its totient is φ = 40646506698.

The previous prime is 40646506627. The next prime is 40646506717. The reversal of 40646506699 is 99660564604.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40646506699 - 2²³ = 40638118091 is a prime.

It is not a weakly prime, because it can be changed into another prime (40686506699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20323253349 + 20323253350.

It is an arithmetic number, because the mean of its divisors is an integer number (20323253350).

Almost surely, 2^40646506699 is an apocalyptic number.

40646506699 is a deficient number, since it is larger than the sum of its proper divisors (1).

40646506699 is an equidigital number, since it uses as much as digits as its factorization.

40646506699 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8398080, while the sum is 55.

The spelling of 40646506699 in words is "forty billion, six hundred forty-six million, five hundred six thousand, six hundred ninety-nine".