7822161643 has 2 divisors, whose sum is σ = 7822161644. Its totient is φ = 7822161642.

The previous prime is 7822161631. The next prime is 7822161647. The reversal of 7822161643 is 3461612287.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 7822161643 - 2²⁹ = 7285290731 is a prime.

It is a super-2 number, since 2×7822161643² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7822161596 and 7822161605.

It is not a weakly prime, because it can be changed into another prime (7822161647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3911080821 + 3911080822.

It is an arithmetic number, because the mean of its divisors is an integer number (3911080822).

Almost surely, 2^7822161643 is an apocalyptic number.

7822161643 is a deficient number, since it is larger than the sum of its proper divisors (1).

7822161643 is an equidigital number, since it uses as much as digits as its factorization.

7822161643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96768, while the sum is 40.

The square root of 7822161643 is about 88442.9852673461. The cubic root of 7822161643 is about 1985.0689461213.

The spelling of 7822161643 in words is "seven billion, eight hundred twenty-two million, one hundred sixty-one thousand, six hundred forty-three".