57820859921 has 8 divisors (see below), whose sum is σ = 63093977184. Its totient is φ = 52550521920.

The previous prime is 57820859897. The next prime is 57820859933. The reversal of 57820859921 is 12995802875.

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 57820859921 - 2⁶ = 57820859857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57820859951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 651191 + ... + 734636.

It is an arithmetic number, because the mean of its divisors is an integer number (7886747148).

Almost surely, 2^57820859921 is an apocalyptic number.

It is an amenable number.

57820859921 is a deficient number, since it is larger than the sum of its proper divisors (5273117263).

57820859921 is a wasteful number, since it uses less digits than its factorization.

57820859921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1389631.

The product of its (nonzero) digits is 3628800, while the sum is 56.

The spelling of 57820859921 in words is "fifty-seven billion, eight hundred twenty million, eight hundred fifty-nine thousand, nine hundred twenty-one".