853555020720 has 40 divisors (see below), whose sum is σ = 2646020564976. Its totient is φ = 227614672128.

The previous prime is 853555020679. The next prime is 853555020727. The reversal of 853555020720 is 27020555358.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (853555020727) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1778239387 + ... + 1778239866.

Almost surely, 2^853555020720 is an apocalyptic number.

853555020720 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

853555020720 is an abundant number, since it is smaller than the sum of its proper divisors (1792465544256).

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

853555020720 is a wasteful number, since it uses less digits than its factorization.

853555020720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3556479269 (or 3556479263 counting only the distinct ones).

The product of its (nonzero) digits is 420000, while the sum is 42.

The spelling of 853555020720 in words is "eight hundred fifty-three billion, five hundred fifty-five million, twenty thousand, seven hundred twenty".