168169022149 has 2 divisors, whose sum is σ = 168169022150. Its totient is φ = 168169022148.

The previous prime is 168169022143. The next prime is 168169022209. The reversal of 168169022149 is 941220961861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 155665757025 + 12503265124 = 394545^2 + 111818^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-168169022149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168169022143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84084511074 + 84084511075.

It is an arithmetic number, because the mean of its divisors is an integer number (84084511075).

Almost surely, 2^168169022149 is an apocalyptic number.

It is an amenable number.

168169022149 is a deficient number, since it is larger than the sum of its proper divisors (1).

168169022149 is an equidigital number, since it uses as much as digits as its factorization.

168169022149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 373248, while the sum is 49.

The spelling of 168169022149 in words is "one hundred sixty-eight billion, one hundred sixty-nine million, twenty-two thousand, one hundred forty-nine".