201611355643 has 2 divisors, whose sum is σ = 201611355644. Its totient is φ = 201611355642.

The previous prime is 201611355593. The next prime is 201611355661. The reversal of 201611355643 is 346553116102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 201611355643 - 2¹⁷ = 201611224571 is a prime.

It is not a weakly prime, because it can be changed into another prime (201611355343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100805677821 + 100805677822.

It is an arithmetic number, because the mean of its divisors is an integer number (100805677822).

Almost surely, 2^201611355643 is an apocalyptic number.

201611355643 is a deficient number, since it is larger than the sum of its proper divisors (1).

201611355643 is an equidigital number, since it uses as much as digits as its factorization.

201611355643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64800, while the sum is 37.

The spelling of 201611355643 in words is "two hundred one billion, six hundred eleven million, three hundred fifty-five thousand, six hundred forty-three".