168116261 has 2 divisors, whose sum is σ = 168116262. Its totient is φ = 168116260.

The previous prime is 168116243. The next prime is 168116287. The reversal of 168116261 is 162611861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 126112900 + 42003361 = 11230^2 + 6481^2 .

It is a cyclic number.

It is not a de Polignac number, because 168116261 - 2²² = 163921957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168116761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84058130 + 84058131.

It is an arithmetic number, because the mean of its divisors is an integer number (84058131).

Almost surely, 2^168116261 is an apocalyptic number.

It is an amenable number.

168116261 is a deficient number, since it is larger than the sum of its proper divisors (1).

168116261 is an equidigital number, since it uses as much as digits as its factorization.

168116261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 32.

The square root of 168116261 is about 12965.9654866115. The cubic root of 168116261 is about 551.9120897688.

The spelling of 168116261 in words is "one hundred sixty-eight million, one hundred sixteen thousand, two hundred sixty-one".