8505725819 has 2 divisors, whose sum is σ = 8505725820. Its totient is φ = 8505725818.

The previous prime is 8505725771. The next prime is 8505725827. The reversal of 8505725819 is 9185275058.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8505725819 - 2⁸ = 8505725563 is a prime.

It is a super-2 number, since 2×8505725819² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8505725849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4252862909 + 4252862910.

It is an arithmetic number, because the mean of its divisors is an integer number (4252862910).

Almost surely, 2^8505725819 is an apocalyptic number.

8505725819 is a deficient number, since it is larger than the sum of its proper divisors (1).

8505725819 is an equidigital number, since it uses as much as digits as its factorization.

8505725819 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008000, while the sum is 50.

The square root of 8505725819 is about 92226.4919586558. The cubic root of 8505725819 is about 2041.2856994404.

The spelling of 8505725819 in words is "eight billion, five hundred five million, seven hundred twenty-five thousand, eight hundred nineteen".