85899345869 has 2 divisors, whose sum is σ = 85899345870. Its totient is φ = 85899345868.

The previous prime is 85899345827. The next prime is 85899345923. The reversal of 85899345869 is 96854399858.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84572200969 + 1327144900 = 290813^2 + 36430^2 .

It is a cyclic number.

It is not a de Polignac number, because 85899345869 - 2¹⁶ = 85899280333 is a prime.

It is a super-2 number, since 2×85899345869² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 85899345796 and 85899345805.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85899345269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42949672934 + 42949672935.

It is an arithmetic number, because the mean of its divisors is an integer number (42949672935).

Almost surely, 2^85899345869 is an apocalyptic number.

It is an amenable number.

85899345869 is a deficient number, since it is larger than the sum of its proper divisors (1).

85899345869 is an equidigital number, since it uses as much as digits as its factorization.

85899345869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 671846400, while the sum is 74.

The spelling of 85899345869 in words is "eighty-five billion, eight hundred ninety-nine million, three hundred forty-five thousand, eight hundred sixty-nine".