85117623281 has 8 divisors (see below), whose sum is σ = 85304197440. Its totient is φ = 84931118992.

The previous prime is 85117623257. The next prime is 85117623293. The reversal of 85117623281 is 18232671158.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85117623281 is a prime.

It is a super-2 number, since 2×85117623281² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85117623781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2973071 + ... + 3001563.

It is an arithmetic number, because the mean of its divisors is an integer number (10663024680).

Almost surely, 2^85117623281 is an apocalyptic number.

It is an amenable number.

85117623281 is a deficient number, since it is larger than the sum of its proper divisors (186574159).

85117623281 is a wasteful number, since it uses less digits than its factorization.

85117623281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34935.

The product of its digits is 161280, while the sum is 44.

The spelling of 85117623281 in words is "eighty-five billion, one hundred seventeen million, six hundred twenty-three thousand, two hundred eighty-one".