7822165819 has 16 divisors (see below), whose sum is σ = 8852765152. Its totient is φ = 6861915648.

The previous prime is 7822165751. The next prime is 7822165831. The reversal of 7822165819 is 9185612287.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 7822165819 - 2²⁷ = 7687948091 is a prime.

It is a super-2 number, since 2×7822165819² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7822165849) 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 15 ways as a sum of consecutive naturals, for example, 168414 + ... + 209779.

It is an arithmetic number, because the mean of its divisors is an integer number (553297822).

Almost surely, 2^7822165819 is an apocalyptic number.

7822165819 is a deficient number, since it is larger than the sum of its proper divisors (1030599333).

7822165819 is a wasteful number, since it uses less digits than its factorization.

7822165819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378286.

The product of its digits is 483840, while the sum is 49.

The square root of 7822165819 is about 88443.0088757727. The cubic root of 7822165819 is about 1985.0692993760.

The spelling of 7822165819 in words is "seven billion, eight hundred twenty-two million, one hundred sixty-five thousand, eight hundred nineteen".