842156739901 has 2 divisors, whose sum is σ = 842156739902. Its totient is φ = 842156739900.

The previous prime is 842156739899. The next prime is 842156739943. The reversal of 842156739901 is 109937651248.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 838596231001 + 3560508900 = 915749^2 + 59670^2 .

It is a cyclic number.

It is not a de Polignac number, because 842156739901 - 2¹ = 842156739899 is a prime.

Together with 842156739899, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (842156739001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 421078369950 + 421078369951.

It is an arithmetic number, because the mean of its divisors is an integer number (421078369951).

It is a 1-persistent number, because it is pandigital, but 2⋅842156739901 = 1684313479802 is not.

Almost surely, 2^842156739901 is an apocalyptic number.

It is an amenable number.

842156739901 is a deficient number, since it is larger than the sum of its proper divisors (1).

842156739901 is an equidigital number, since it uses as much as digits as its factorization.

842156739901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3265920, while the sum is 55.

The spelling of 842156739901 in words is "eight hundred forty-two billion, one hundred fifty-six million, seven hundred thirty-nine thousand, nine hundred one".