82611221929 has 2 divisors, whose sum is σ = 82611221930. Its totient is φ = 82611221928.

The previous prime is 82611221923. The next prime is 82611221981. The reversal of 82611221929 is 92912211628.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55196803600 + 27414418329 = 234940^2 + 165573^2 .

It is a cyclic number.

It is not a de Polignac number, because 82611221929 - 2⁹ = 82611221417 is a prime.

It is a super-2 number, since 2×82611221929² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (82611221923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41305610964 + 41305610965.

It is an arithmetic number, because the mean of its divisors is an integer number (41305610965).

Almost surely, 2^82611221929 is an apocalyptic number.

It is an amenable number.

82611221929 is a deficient number, since it is larger than the sum of its proper divisors (1).

82611221929 is an equidigital number, since it uses as much as digits as its factorization.

82611221929 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 43.

The spelling of 82611221929 in words is "eighty-two billion, six hundred eleven million, two hundred twenty-one thousand, nine hundred twenty-nine".