57821946909 has 16 divisors (see below), whose sum is σ = 78376084800. Its totient is φ = 37908149760.

The previous prime is 57821946869. The next prime is 57821946953. The reversal of 57821946909 is 90964912875.

It is not a de Polignac number, because 57821946909 - 2⁹ = 57821946397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57821946109) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 926317 + ... + 986765.

It is an arithmetic number, because the mean of its divisors is an integer number (4898505300).

Almost surely, 2^57821946909 is an apocalyptic number.

It is an amenable number.

57821946909 is a deficient number, since it is larger than the sum of its proper divisors (20554137891).

57821946909 is a wasteful number, since it uses less digits than its factorization.

57821946909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65740.

The product of its (nonzero) digits is 9797760, while the sum is 60.

The spelling of 57821946909 in words is "fifty-seven billion, eight hundred twenty-one million, nine hundred forty-six thousand, nine hundred nine".