85005867920 has 40 divisors (see below), whose sum is σ = 197799423360. Its totient is φ = 33974686080.

The previous prime is 85005867913. The next prime is 85005867971. The reversal of 85005867920 is 2976850058.

It is a tau number, because it is divible by the number of its divisors (40).

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, 333110 + ... + 530069.

It is an arithmetic number, because the mean of its divisors is an integer number (4944985584).

Almost surely, 2^85005867920 is an apocalyptic number.

85005867920 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

85005867920 is an abundant number, since it is smaller than the sum of its proper divisors (112793555440).

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

85005867920 is a wasteful number, since it uses less digits than its factorization.

85005867920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 864423 (or 864417 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 50.

The spelling of 85005867920 in words is "eighty-five billion, five million, eight hundred sixty-seven thousand, nine hundred twenty".