57428382817 has 4 divisors (see below), whose sum is σ = 61845950740. Its totient is φ = 53010814896.

The previous prime is 57428382811. The next prime is 57428382877. The reversal of 57428382817 is 71828382475.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 22165552161 + 35262830656 = 148881^2 + 187784^2 .

It is a de Polignac number, because none of the positive numbers 2^k-57428382817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57428382811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2208783942 + ... + 2208783967.

It is an arithmetic number, because the mean of its divisors is an integer number (15461487685).

Almost surely, 2^57428382817 is an apocalyptic number.

It is an amenable number.

57428382817 is a deficient number, since it is larger than the sum of its proper divisors (4417567923).

57428382817 is a wasteful number, since it uses less digits than its factorization.

57428382817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4417567922.

The product of its digits is 6021120, while the sum is 55.

The spelling of 57428382817 in words is "fifty-seven billion, four hundred twenty-eight million, three hundred eighty-two thousand, eight hundred seventeen".