81650825083 has 2 divisors, whose sum is σ = 81650825084. Its totient is φ = 81650825082.

The previous prime is 81650825063. The next prime is 81650825117. The reversal of 81650825083 is 38052805618.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81650825083 - 2⁹ = 81650824571 is a prime.

It is not a weakly prime, because it can be changed into another prime (81650825063) 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, 40825412541 + 40825412542.

It is an arithmetic number, because the mean of its divisors is an integer number (40825412542).

Almost surely, 2^81650825083 is an apocalyptic number.

81650825083 is a deficient number, since it is larger than the sum of its proper divisors (1).

81650825083 is an equidigital number, since it uses as much as digits as its factorization.

81650825083 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 460800, while the sum is 46.

The spelling of 81650825083 in words is "eighty-one billion, six hundred fifty million, eight hundred twenty-five thousand, eighty-three".