81392094863 has 2 divisors, whose sum is σ = 81392094864. Its totient is φ = 81392094862.

The previous prime is 81392094841. The next prime is 81392094877. The reversal of 81392094863 is 36849029318.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81392094863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81392094803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40696047431 + 40696047432.

It is an arithmetic number, because the mean of its divisors is an integer number (40696047432).

Almost surely, 2^81392094863 is an apocalyptic number.

81392094863 is a deficient number, since it is larger than the sum of its proper divisors (1).

81392094863 is an equidigital number, since it uses as much as digits as its factorization.

81392094863 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2239488, while the sum is 53.

The spelling of 81392094863 in words is "eighty-one billion, three hundred ninety-two million, ninety-four thousand, eight hundred sixty-three".