85705320458 has 4 divisors (see below), whose sum is σ = 128557980690. Its totient is φ = 42852660228.

The previous prime is 85705320451. The next prime is 85705320469. The reversal of 85705320458 is 85402350758.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 85402350758 = 2 ⋅42701175379.

It can be written as a sum of positive squares in only one way, i.e., 85548645169 + 156675289 = 292487^2 + 12517^2 .

It is not an unprimeable number, because it can be changed into a prime (85705320451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21426330113 + ... + 21426330116.

Almost surely, 2^85705320458 is an apocalyptic number.

85705320458 is a deficient number, since it is larger than the sum of its proper divisors (42852660232).

85705320458 is a wasteful number, since it uses less digits than its factorization.

85705320458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42852660231.

The product of its (nonzero) digits is 1344000, while the sum is 47.

The spelling of 85705320458 in words is "eighty-five billion, seven hundred five million, three hundred twenty thousand, four hundred fifty-eight".