196256073646081 has 2 divisors, whose sum is σ = 196256073646082. Its totient is φ = 196256073646080.

The previous prime is 196256073646027. The next prime is 196256073646091. The reversal of 196256073646081 is 180646370652691.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 193489240621681 + 2766833024400 = 13910041^2 + 1663380^2 .

It is an emirp because it is prime and its reverse (180646370652691) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 196256073646081 - 2²⁹ = 196255536775169 is a prime.

It is a super-2 number, since 2×196256073646081² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (196256073646091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98128036823040 + 98128036823041.

It is an arithmetic number, because the mean of its divisors is an integer number (98128036823041).

It is a 1-persistent number, because it is pandigital, but 2⋅196256073646081 = 392512147292162 is not.

Almost surely, 2^{196256073646081} is an apocalyptic number.

It is an amenable number.

196256073646081 is a deficient number, since it is larger than the sum of its proper divisors (1).

196256073646081 is an equidigital number, since it uses as much as digits as its factorization.

196256073646081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 78382080, while the sum is 64.

The spelling of 196256073646081 in words is "one hundred ninety-six trillion, two hundred fifty-six billion, seventy-three million, six hundred forty-six thousand, eighty-one".