57731353020 has 384 divisors, whose sum is σ = 201877401600. Its totient is φ = 13689688320.

The previous prime is 57731352971. The next prime is 57731353037. The reversal of 57731353020 is 2035313775.

57731353020 is a `hidden beast` number, since 5 + 77 + 31 + 3 + 530 + 20 = 666.

57731353020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 33779926 + ... + 33781634.

It is an arithmetic number, because the mean of its divisors is an integer number (525722400).

Almost surely, 2^57731353020 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57731353020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100938700800).

57731353020 is an abundant number, since it is smaller than the sum of its proper divisors (144146048580).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

57731353020 is a wasteful number, since it uses less digits than its factorization.

57731353020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1807 (or 1777 counting only the distinct ones).

The product of its (nonzero) digits is 66150, while the sum is 36.

Adding to 57731353020 its reverse (2035313775), we get a palindrome (59766666795).

The spelling of 57731353020 in words is "fifty-seven billion, seven hundred thirty-one million, three hundred fifty-three thousand, twenty".