85369720520 has 64 divisors (see below), whose sum is σ = 219777131520. Its totient is φ = 29235619584.

The previous prime is 85369720487. The next prime is 85369720523. The reversal of 85369720520 is 2502796358.

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

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64994 + ... + 418286.

It is an arithmetic number, because the mean of its divisors is an integer number (3434017680).

Almost surely, 2^85369720520 is an apocalyptic number.

It is an amenable number.

85369720520 is an abundant number, since it is smaller than the sum of its proper divisors (134407411000).

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

85369720520 is a wasteful number, since it uses less digits than its factorization.

85369720520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354174 (or 354170 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 47.

The spelling of 85369720520 in words is "eighty-five billion, three hundred sixty-nine million, seven hundred twenty thousand, five hundred twenty".