85438507699 has 2 divisors, whose sum is σ = 85438507700. Its totient is φ = 85438507698.

The previous prime is 85438507667. The next prime is 85438507729. The reversal of 85438507699 is 99670583458.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85438507699 - 2⁵ = 85438507667 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85438507699.

It is not a weakly prime, because it can be changed into another prime (85438507199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42719253849 + 42719253850.

It is an arithmetic number, because the mean of its divisors is an integer number (42719253850).

Almost surely, 2^85438507699 is an apocalyptic number.

85438507699 is a deficient number, since it is larger than the sum of its proper divisors (1).

85438507699 is an equidigital number, since it uses as much as digits as its factorization.

85438507699 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 65318400, while the sum is 64.

The spelling of 85438507699 in words is "eighty-five billion, four hundred thirty-eight million, five hundred seven thousand, six hundred ninety-nine".