168100644883901 has 2 divisors, whose sum is σ = 168100644883902. Its totient is φ = 168100644883900.

The previous prime is 168100644883879. The next prime is 168100644883903. The reversal of 168100644883901 is 109388446001861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 154545325003876 + 13555319880025 = 12431626^2 + 3681755^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-168100644883901 is a prime.

Together with 168100644883903, 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 (168100644883903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84050322441950 + 84050322441951.

It is an arithmetic number, because the mean of its divisors is an integer number (84050322441951).

Almost surely, 2^{168100644883901} is an apocalyptic number.

It is an amenable number.

168100644883901 is a deficient number, since it is larger than the sum of its proper divisors (1).

168100644883901 is an equidigital number, since it uses as much as digits as its factorization.

168100644883901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7962624, while the sum is 59.

The spelling of 168100644883901 in words is "one hundred sixty-eight trillion, one hundred billion, six hundred forty-four million, eight hundred eighty-three thousand, nine hundred one".