2161461604163 has 2 divisors, whose sum is σ = 2161461604164. Its totient is φ = 2161461604162.

The previous prime is 2161461604123. The next prime is 2161461604171. The reversal of 2161461604163 is 3614061641612.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2161461604163 - 2¹⁰ = 2161461603139 is a prime.

It is a super-3 number, since 3×2161461604163³ (a number of 38 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2161461604163.

It is not a weakly prime, because it can be changed into another prime (2161461604123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1080730802081 + 1080730802082.

It is an arithmetic number, because the mean of its divisors is an integer number (1080730802082).

Almost surely, 2^{2161461604163} is an apocalyptic number.

2161461604163 is a deficient number, since it is larger than the sum of its proper divisors (1).

2161461604163 is an equidigital number, since it uses as much as digits as its factorization.

2161461604163 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 124416, while the sum is 41.

The spelling of 2161461604163 in words is "two trillion, one hundred sixty-one billion, four hundred sixty-one million, six hundred four thousand, one hundred sixty-three".