81068294863 has 2 divisors, whose sum is σ = 81068294864. Its totient is φ = 81068294862.

The previous prime is 81068294861. The next prime is 81068294887. The reversal of 81068294863 is 36849286018.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81068294863 - 2¹ = 81068294861 is a prime.

Together with 81068294861, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81068294861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40534147431 + 40534147432.

It is an arithmetic number, because the mean of its divisors is an integer number (40534147432).

Almost surely, 2^81068294863 is an apocalyptic number.

81068294863 is a deficient number, since it is larger than the sum of its proper divisors (1).

81068294863 is an equidigital number, since it uses as much as digits as its factorization.

81068294863 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3981312, while the sum is 55.

The spelling of 81068294863 in words is "eighty-one billion, sixty-eight million, two hundred ninety-four thousand, eight hundred sixty-three".