82906648081 has 2 divisors, whose sum is σ = 82906648082. Its totient is φ = 82906648080.

The previous prime is 82906648043. The next prime is 82906648091. The reversal of 82906648081 is 18084660928.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51113975056 + 31792673025 = 226084^2 + 178305^2 .

It is a cyclic number.

It is not a de Polignac number, because 82906648081 - 2³³ = 74316713489 is a prime.

It is a super-2 number, since 2×82906648081² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (82906648091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41453324040 + 41453324041.

It is an arithmetic number, because the mean of its divisors is an integer number (41453324041).

Almost surely, 2^82906648081 is an apocalyptic number.

It is an amenable number.

82906648081 is a deficient number, since it is larger than the sum of its proper divisors (1).

82906648081 is an equidigital number, since it uses as much as digits as its factorization.

82906648081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1327104, while the sum is 52.

The spelling of 82906648081 in words is "eighty-two billion, nine hundred six million, six hundred forty-eight thousand, eighty-one".