853925515421 has 8 divisors (see below), whose sum is σ = 932964427488. Its totient is φ = 775121490000.

The previous prime is 853925515361. The next prime is 853925515427. The reversal of 853925515421 is 124515529358.

It is a happy number.

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

It is not a de Polignac number, because 853925515421 - 2⁶ = 853925515357 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 853925515421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (853925515427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58714055 + ... + 58728596.

It is an arithmetic number, because the mean of its divisors is an integer number (116620553436).

Almost surely, 2^853925515421 is an apocalyptic number.

It is an amenable number.

853925515421 is a deficient number, since it is larger than the sum of its proper divisors (79038912067).

853925515421 is a wasteful number, since it uses less digits than its factorization.

853925515421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117443323.

The product of its digits is 2160000, while the sum is 50.

The spelling of 853925515421 in words is "eight hundred fifty-three billion, nine hundred twenty-five million, five hundred fifteen thousand, four hundred twenty-one".