85369720524 has 48 divisors (see below), whose sum is σ = 217666517376. Its totient is φ = 25826544000.

The previous prime is 85369720523. The next prime is 85369720531. The reversal of 85369720524 is 42502796358.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (85369720523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 458722 + ... + 617385.

It is an arithmetic number, because the mean of its divisors is an integer number (4534719112).

Almost surely, 2^85369720524 is an apocalyptic number.

It is an amenable number.

85369720524 is an abundant number, since it is smaller than the sum of its proper divisors (132296796852).

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

85369720524 is a wasteful number, since it uses less digits than its factorization.

85369720524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1076726 (or 1076724 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 51.

The spelling of 85369720524 in words is "eighty-five billion, three hundred sixty-nine million, seven hundred twenty thousand, five hundred twenty-four".