78859850101 has 2 divisors, whose sum is σ = 78859850102. Its totient is φ = 78859850100.

The previous prime is 78859850081. The next prime is 78859850117. The reversal of 78859850101 is 10105895887.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72654507025 + 6205343076 = 269545^2 + 78774^2 .

It is a cyclic number.

It is not a de Polignac number, because 78859850101 - 2¹³ = 78859841909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78859850131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39429925050 + 39429925051.

It is an arithmetic number, because the mean of its divisors is an integer number (39429925051).

Almost surely, 2^78859850101 is an apocalyptic number.

It is an amenable number.

78859850101 is a deficient number, since it is larger than the sum of its proper divisors (1).

78859850101 is an equidigital number, since it uses as much as digits as its factorization.

78859850101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 806400, while the sum is 52.

The spelling of 78859850101 in words is "seventy-eight billion, eight hundred fifty-nine million, eight hundred fifty thousand, one hundred one".