85521885481 has 8 divisors (see below), whose sum is σ = 89244077760. Its totient is φ = 81800014032.

The previous prime is 85521885467. The next prime is 85521885487. The reversal of 85521885481 is 18458812558.

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-85521885481 is a prime.

It is a super-2 number, since 2×85521885481² (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 (85521885487) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 580366 + ... + 712648.

It is an arithmetic number, because the mean of its divisors is an integer number (11155509720).

Almost surely, 2^85521885481 is an apocalyptic number.

It is an amenable number.

85521885481 is a deficient number, since it is larger than the sum of its proper divisors (3722192279).

85521885481 is a wasteful number, since it uses less digits than its factorization.

85521885481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160415.

The product of its digits is 4096000, while the sum is 55.

The spelling of 85521885481 in words is "eighty-five billion, five hundred twenty-one million, eight hundred eighty-five thousand, four hundred eighty-one".