85510865647 has 2 divisors, whose sum is σ = 85510865648. Its totient is φ = 85510865646.

The previous prime is 85510865603. The next prime is 85510865677. The reversal of 85510865647 is 74656801558.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85510865647 - 2⁷ = 85510865519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85510865677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42755432823 + 42755432824.

It is an arithmetic number, because the mean of its divisors is an integer number (42755432824).

Almost surely, 2^85510865647 is an apocalyptic number.

85510865647 is a deficient number, since it is larger than the sum of its proper divisors (1).

85510865647 is an equidigital number, since it uses as much as digits as its factorization.

85510865647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064000, while the sum is 55.

The spelling of 85510865647 in words is "eighty-five billion, five hundred ten million, eight hundred sixty-five thousand, six hundred forty-seven".