81095424797 has 2 divisors, whose sum is σ = 81095424798. Its totient is φ = 81095424796.

The previous prime is 81095424757. The next prime is 81095424799. The reversal of 81095424797 is 79742459018.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62167443556 + 18927981241 = 249334^2 + 137579^2 .

It is a cyclic number.

It is not a de Polignac number, because 81095424797 - 2¹⁸ = 81095162653 is a prime.

Together with 81095424799, 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 (81095424799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40547712398 + 40547712399.

It is an arithmetic number, because the mean of its divisors is an integer number (40547712399).

Almost surely, 2^81095424797 is an apocalyptic number.

It is an amenable number.

81095424797 is a deficient number, since it is larger than the sum of its proper divisors (1).

81095424797 is an equidigital number, since it uses as much as digits as its factorization.

81095424797 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5080320, while the sum is 56.

The spelling of 81095424797 in words is "eighty-one billion, ninety-five million, four hundred twenty-four thousand, seven hundred ninety-seven".