82123261091 has 8 divisors (see below), whose sum is σ = 83213328240. Its totient is φ = 81039167488.

The previous prime is 82123261049. The next prime is 82123261097. The reversal of 82123261091 is 19016232128.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 82123261091 - 2²² = 82119066787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82123261097) 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 in 7 ways as a sum of consecutive naturals, for example, 1465706 + ... + 1520703.

It is an arithmetic number, because the mean of its divisors is an integer number (10401666030).

Almost surely, 2^82123261091 is an apocalyptic number.

82123261091 is a deficient number, since it is larger than the sum of its proper divisors (1090067149).

82123261091 is a wasteful number, since it uses less digits than its factorization.

82123261091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2986773.

The product of its (nonzero) digits is 10368, while the sum is 35.

The spelling of 82123261091 in words is "eighty-two billion, one hundred twenty-three million, two hundred sixty-one thousand, ninety-one".