857533563421 has 8 divisors (see below), whose sum is σ = 870128395488. Its totient is φ = 845019210000.

The previous prime is 857533563391. The next prime is 857533563457. The reversal of 857533563421 is 124365335758.

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

It is a cyclic number.

It is not a de Polignac number, because 857533563421 - 2⁵ = 857533563389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (857533563121) 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, 20098195 + ... + 20140816.

It is an arithmetic number, because the mean of its divisors is an integer number (108766049436).

Almost surely, 2^857533563421 is an apocalyptic number.

It is an amenable number.

857533563421 is a deficient number, since it is larger than the sum of its proper divisors (12594832067).

857533563421 is a wasteful number, since it uses less digits than its factorization.

857533563421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40239323.

The product of its digits is 9072000, while the sum is 52.

The spelling of 857533563421 in words is "eight hundred fifty-seven billion, five hundred thirty-three million, five hundred sixty-three thousand, four hundred twenty-one".