85144467450 has 48 divisors (see below), whose sum is σ = 241323750720. Its totient is φ = 19461592320.

The previous prime is 85144467439. The next prime is 85144467481. The reversal of 85144467450 is 5476444158.

It is a self number, because there is not a number n which added to its sum of digits gives 85144467450.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40543935 + ... + 40546034.

It is an arithmetic number, because the mean of its divisors is an integer number (5027578140).

Almost surely, 2^85144467450 is an apocalyptic number.

85144467450 is an abundant number, since it is smaller than the sum of its proper divisors (156179283270).

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

85144467450 is a wasteful number, since it uses less digits than its factorization.

85144467450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81089991 (or 81089986 counting only the distinct ones).

The product of its (nonzero) digits is 2150400, while the sum is 48.

The spelling of 85144467450 in words is "eighty-five billion, one hundred forty-four million, four hundred sixty-seven thousand, four hundred fifty".