168140503901 has 2 divisors, whose sum is σ = 168140503902. Its totient is φ = 168140503900.

The previous prime is 168140503889. The next prime is 168140503903. The reversal of 168140503901 is 109305041861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 145565140900 + 22575363001 = 381530^2 + 150251^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-168140503901 is a prime.

Together with 168140503903, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168140503903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84070251950 + 84070251951.

It is an arithmetic number, because the mean of its divisors is an integer number (84070251951).

Almost surely, 2^168140503901 is an apocalyptic number.

It is an amenable number.

168140503901 is a deficient number, since it is larger than the sum of its proper divisors (1).

168140503901 is an equidigital number, since it uses as much as digits as its factorization.

168140503901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 38.

The spelling of 168140503901 in words is "one hundred sixty-eight billion, one hundred forty million, five hundred three thousand, nine hundred one".