8148564469 has 2 divisors, whose sum is σ = 8148564470. Its totient is φ = 8148564468.

The previous prime is 8148564451. The next prime is 8148564481. The reversal of 8148564469 is 9644658418.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7580314225 + 568250244 = 87065^2 + 23838^2 .

It is a cyclic number.

It is not a de Polignac number, because 8148564469 - 2⁹ = 8148563957 is a prime.

It is a super-2 number, since 2×8148564469² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8148564439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4074282234 + 4074282235.

It is an arithmetic number, because the mean of its divisors is an integer number (4074282235).

Almost surely, 2^8148564469 is an apocalyptic number.

It is an amenable number.

8148564469 is a deficient number, since it is larger than the sum of its proper divisors (1).

8148564469 is an equidigital number, since it uses as much as digits as its factorization.

8148564469 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6635520, while the sum is 55.

The square root of 8148564469 is about 90269.3994053356. The cubic root of 8148564469 is about 2012.3045166090.

The spelling of 8148564469 in words is "eight billion, one hundred forty-eight million, five hundred sixty-four thousand, four hundred sixty-nine".