85280352785 has 8 divisors (see below), whose sum is σ = 102761057256. Its totient is φ = 67941192960.

The previous prime is 85280352767. The next prime is 85280352841. The reversal of 85280352785 is 58725308258.

It is a Cunningham number, because it is equal to 292028²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 1269069376 + 84011283409 = 35624^2 + 289847^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 85280352785 - 2⁶ = 85280352721 is a prime.

It is a super-2 number, since 2×85280352785² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 35384834 + ... + 35387243.

It is an arithmetic number, because the mean of its divisors is an integer number (12845132157).

Almost surely, 2^85280352785 is an apocalyptic number.

It is an amenable number.

85280352785 is a deficient number, since it is larger than the sum of its proper divisors (17480704471).

85280352785 is a wasteful number, since it uses less digits than its factorization.

85280352785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70772323.

The product of its (nonzero) digits is 5376000, while the sum is 53.

The spelling of 85280352785 in words is "eighty-five billion, two hundred eighty million, three hundred fifty-two thousand, seven hundred eighty-five".