853493785920 has 140 divisors (see below), whose sum is σ = 3036027640404. Its totient is φ = 227598336000.

The previous prime is 853493785901. The next prime is 853493785943. The reversal of 853493785920 is 29587394358.

853493785920 is a `hidden beast` number, since 8 + 5 + 3 + 4 + 9 + 37 + 8 + 592 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 389765473344 + 463728312576 = 624312^2 + 680976^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 16438081 + ... + 16489920.

Almost surely, 2^853493785920 is an apocalyptic number.

853493785920 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

853493785920 is an abundant number, since it is smaller than the sum of its proper divisors (2182533854484).

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

853493785920 is a wasteful number, since it uses less digits than its factorization.

853493785920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32928030 (or 32928011 counting only the distinct ones).

The product of its (nonzero) digits is 65318400, while the sum is 63.

The spelling of 853493785920 in words is "eight hundred fifty-three billion, four hundred ninety-three million, seven hundred eighty-five thousand, nine hundred twenty".