85542863509 has 8 divisors (see below), whose sum is σ = 86053495680. Its totient is φ = 85033504416.

The previous prime is 85542863491. The next prime is 85542863521. The reversal of 85542863509 is 90536824558.

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 85542863509 - 2¹⁹ = 85542339221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 85542863509.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85542863579) 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, 183312 + ... + 452425.

It is an arithmetic number, because the mean of its divisors is an integer number (10756686960).

Almost surely, 2^85542863509 is an apocalyptic number.

It is an amenable number.

85542863509 is a deficient number, since it is larger than the sum of its proper divisors (510632171).

85542863509 is a wasteful number, since it uses less digits than its factorization.

85542863509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636539.

The product of its (nonzero) digits is 10368000, while the sum is 55.

The spelling of 85542863509 in words is "eighty-five billion, five hundred forty-two million, eight hundred sixty-three thousand, five hundred nine".