65518225859 has 2 divisors, whose sum is σ = 65518225860. Its totient is φ = 65518225858.

The previous prime is 65518225847. The next prime is 65518225933. The reversal of 65518225859 is 95852281556.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65518225859 - 2²⁰ = 65517177283 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (65518225159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32759112929 + 32759112930.

It is an arithmetic number, because the mean of its divisors is an integer number (32759112930).

Almost surely, 2^65518225859 is an apocalyptic number.

65518225859 is a deficient number, since it is larger than the sum of its proper divisors (1).

65518225859 is an equidigital number, since it uses as much as digits as its factorization.

65518225859 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640000, while the sum is 56.

The spelling of 65518225859 in words is "sixty-five billion, five hundred eighteen million, two hundred twenty-five thousand, eight hundred fifty-nine".