85535243847 has 12 divisors (see below), whose sum is σ = 123603580360. Its totient is φ = 56999185488.

The previous prime is 85535243821. The next prime is 85535243869. The reversal of 85535243847 is 74834253558.

85535243847 is a `hidden beast` number, since 8 + 5 + 535 + 24 + 3 + 84 + 7 = 666.

It is not a de Polignac number, because 85535243847 - 2¹⁹ = 85534719559 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 85535243793 and 85535243802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85535243747) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2003572 + ... + 2045817.

Almost surely, 2^85535243847 is an apocalyptic number.

85535243847 is a deficient number, since it is larger than the sum of its proper divisors (38068336513).

85535243847 is a wasteful number, since it uses less digits than its factorization.

85535243847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4051742 (or 4051739 counting only the distinct ones).

The product of its digits is 16128000, while the sum is 54.

The spelling of 85535243847 in words is "eighty-five billion, five hundred thirty-five million, two hundred forty-three thousand, eight hundred forty-seven".