81880075558763 has 2 divisors, whose sum is σ = 81880075558764. Its totient is φ = 81880075558762.

The previous prime is 81880075558759. The next prime is 81880075558849. The reversal of 81880075558763 is 36785557008818.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81880075558763 - 2² = 81880075558759 is a prime.

It is not a weakly prime, because it can be changed into another prime (81880075558733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40940037779381 + 40940037779382.

It is an arithmetic number, because the mean of its divisors is an integer number (40940037779382).

Almost surely, 2^{81880075558763} is an apocalyptic number.

81880075558763 is a deficient number, since it is larger than the sum of its proper divisors (1).

81880075558763 is an equidigital number, since it uses as much as digits as its factorization.

81880075558763 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 451584000, while the sum is 71.

The spelling of 81880075558763 in words is "eighty-one trillion, eight hundred eighty billion, seventy-five million, five hundred fifty-eight thousand, seven hundred sixty-three".