81063863051 has 2 divisors, whose sum is σ = 81063863052. Its totient is φ = 81063863050.

The previous prime is 81063863011. The next prime is 81063863059. The reversal of 81063863051 is 15036836018.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 81063863051 - 2⁶ = 81063862987 is a prime.

It is not a weakly prime, because it can be changed into another prime (81063863059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40531931525 + 40531931526.

It is an arithmetic number, because the mean of its divisors is an integer number (40531931526).

Almost surely, 2^81063863051 is an apocalyptic number.

81063863051 is a deficient number, since it is larger than the sum of its proper divisors (1).

81063863051 is an equidigital number, since it uses as much as digits as its factorization.

81063863051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 103680, while the sum is 41.

The spelling of 81063863051 in words is "eighty-one billion, sixty-three million, eight hundred sixty-three thousand, fifty-one".