395117105081 has 2 divisors, whose sum is σ = 395117105082. Its totient is φ = 395117105080.

The previous prime is 395117105023. The next prime is 395117105189. The reversal of 395117105081 is 180501711593.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 390105173056 + 5011932025 = 624584^2 + 70795^2 .

It is a cyclic number.

It is not a de Polignac number, because 395117105081 - 2²⁶ = 395049996217 is a prime.

It is a super-2 number, since 2×395117105081² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (395117105281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197558552540 + 197558552541.

It is an arithmetic number, because the mean of its divisors is an integer number (197558552541).

Almost surely, 2^395117105081 is an apocalyptic number.

It is an amenable number.

395117105081 is a deficient number, since it is larger than the sum of its proper divisors (1).

395117105081 is an equidigital number, since it uses as much as digits as its factorization.

395117105081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37800, while the sum is 41.

The spelling of 395117105081 in words is "three hundred ninety-five billion, one hundred seventeen million, one hundred five thousand, eighty-one".