85520317255 has 8 divisors (see below), whose sum is σ = 103005885600. Its totient is φ = 68161917216.

The previous prime is 85520317247. The next prime is 85520317279. The reversal of 85520317255 is 55271302558.

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

It is a cyclic number.

It is not a de Polignac number, because 85520317255 - 2³ = 85520317247 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31790595 + ... + 31793284.

It is an arithmetic number, because the mean of its divisors is an integer number (12875735700).

Almost surely, 2^85520317255 is an apocalyptic number.

85520317255 is a deficient number, since it is larger than the sum of its proper divisors (17485568345).

85520317255 is a wasteful number, since it uses less digits than its factorization.

85520317255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63584153.

The product of its (nonzero) digits is 420000, while the sum is 43.

The spelling of 85520317255 in words is "eighty-five billion, five hundred twenty million, three hundred seventeen thousand, two hundred fifty-five".