168426426251 has 2 divisors, whose sum is σ = 168426426252. Its totient is φ = 168426426250.

The previous prime is 168426426197. The next prime is 168426426293. The reversal of 168426426251 is 152624624861.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 168426426251 - 2³⁰ = 167352684427 is a prime.

It is a super-3 number, since 3×168426426251³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 168426426196 and 168426426205.

It is not a weakly prime, because it can be changed into another prime (168426426451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84213213125 + 84213213126.

It is an arithmetic number, because the mean of its divisors is an integer number (84213213126).

Almost surely, 2^168426426251 is an apocalyptic number.

168426426251 is a deficient number, since it is larger than the sum of its proper divisors (1).

168426426251 is an equidigital number, since it uses as much as digits as its factorization.

168426426251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1105920, while the sum is 47.

The spelling of 168426426251 in words is "one hundred sixty-eight billion, four hundred twenty-six million, four hundred twenty-six thousand, two hundred fifty-one".