16640616163 has 2 divisors, whose sum is σ = 16640616164. Its totient is φ = 16640616162.

The previous prime is 16640616101. The next prime is 16640616191. The reversal of 16640616163 is 36161604661.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16640616163 - 2¹⁷ = 16640485091 is a prime.

It is not a weakly prime, because it can be changed into another prime (16640616463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8320308081 + 8320308082.

It is an arithmetic number, because the mean of its divisors is an integer number (8320308082).

Almost surely, 2^16640616163 is an apocalyptic number.

16640616163 is a deficient number, since it is larger than the sum of its proper divisors (1).

16640616163 is an equidigital number, since it uses as much as digits as its factorization.

16640616163 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 40.

The spelling of 16640616163 in words is "sixteen billion, six hundred forty million, six hundred sixteen thousand, one hundred sixty-three".