82074881858 has 6 divisors (see below), whose sum is σ = 123112930521. Its totient is φ = 41037238352.

The previous prime is 82074881849. The next prime is 82074881899. The reversal of 82074881858 is 85818847028.

It can be written as a sum of positive squares in 2 ways, for example, as 81238110529 + 836771329 = 285023^2 + 28927^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=202577.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 82074881797 and 82074881806.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 303866 + ... + 506442.

Almost surely, 2^82074881858 is an apocalyptic number.

82074881858 is a deficient number, since it is larger than the sum of its proper divisors (41038048663).

82074881858 is an frugal number, since it uses more digits than its factorization.

82074881858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405156 (or 202579 counting only the distinct ones).

The product of its (nonzero) digits is 9175040, while the sum is 59.

The spelling of 82074881858 in words is "eighty-two billion, seventy-four million, eight hundred eighty-one thousand, eight hundred fifty-eight".