853885155021 has 8 divisors (see below), whose sum is σ = 1138759086624. Its totient is φ = 569133996720.

The previous prime is 853885154999. The next prime is 853885155059. The reversal of 853885155021 is 120551588358.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 853885155021 - 2⁷ = 853885154893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (853885150021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30677095 + ... + 30704916.

It is an arithmetic number, because the mean of its divisors is an integer number (142344885828).

Almost surely, 2^853885155021 is an apocalyptic number.

It is an amenable number.

853885155021 is a deficient number, since it is larger than the sum of its proper divisors (284873931603).

853885155021 is a wasteful number, since it uses less digits than its factorization.

853885155021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61386651.

The product of its (nonzero) digits is 1920000, while the sum is 51.

The spelling of 853885155021 in words is "eight hundred fifty-three billion, eight hundred eighty-five million, one hundred fifty-five thousand, twenty-one".