85447765220 has 48 divisors (see below), whose sum is σ = 184685417280. Its totient is φ = 33184001664.

The previous prime is 85447765211. The next prime is 85447765231. The reversal of 85447765220 is 2256774458.

It is an unprimeable number.

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, 221951 + ... + 469209.

It is an arithmetic number, because the mean of its divisors is an integer number (3847612860).

Almost surely, 2^85447765220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 85447765220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92342708640).

85447765220 is an abundant number, since it is smaller than the sum of its proper divisors (99237652060).

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

85447765220 is a wasteful number, since it uses less digits than its factorization.

85447765220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247772 (or 247770 counting only the distinct ones).

The product of its (nonzero) digits is 3763200, while the sum is 50.

The spelling of 85447765220 in words is "eighty-five billion, four hundred forty-seven million, seven hundred sixty-five thousand, two hundred twenty".