85415469710209 has 2 divisors, whose sum is σ = 85415469710210. Its totient is φ = 85415469710208.

The previous prime is 85415469710113. The next prime is 85415469710287. The reversal of 85415469710209 is 90201796451458.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62186472505600 + 23228997204609 = 7885840^2 + 4819647^2 .

It is a cyclic number.

It is not a de Polignac number, because 85415469710209 - 2¹⁵ = 85415469677441 is a prime.

It is not a weakly prime, because it can be changed into another prime (85415469710509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42707734855104 + 42707734855105.

It is an arithmetic number, because the mean of its divisors is an integer number (42707734855105).

Almost surely, 2^{85415469710209} is an apocalyptic number.

It is an amenable number.

85415469710209 is a deficient number, since it is larger than the sum of its proper divisors (1).

85415469710209 is an equidigital number, since it uses as much as digits as its factorization.

85415469710209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21772800, while the sum is 61.

The spelling of 85415469710209 in words is "eighty-five trillion, four hundred fifteen billion, four hundred sixty-nine million, seven hundred ten thousand, two hundred nine".