85855384540 has 24 divisors (see below), whose sum is σ = 180332005392. Its totient is φ = 34335354240.

The previous prime is 85855384519. The next prime is 85855384553. The reversal of 85855384540 is 4548355858.

It is a super-2 number, since 2×85855384540² (a number of 23 digits) contains 22 as substring.

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, 320814 + ... + 524053.

It is an arithmetic number, because the mean of its divisors is an integer number (7513833558).

Almost surely, 2^85855384540 is an apocalyptic number.

It is an amenable number.

85855384540 is an abundant number, since it is smaller than the sum of its proper divisors (94476620852).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

85855384540 is a wasteful number, since it uses less digits than its factorization.

85855384540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 849957 (or 849955 counting only the distinct ones).

The product of its (nonzero) digits is 15360000, while the sum is 55.

The spelling of 85855384540 in words is "eighty-five billion, eight hundred fifty-five million, three hundred eighty-four thousand, five hundred forty".