57128471680 has 128 divisors (see below), whose sum is σ = 156314396160. Its totient is φ = 19557888000.

The previous prime is 57128471677. The next prime is 57128471681. The reversal of 57128471680 is 8617482175.

It is a tau number, because it is divible by the number of its divisors (128).

It is not an unprimeable number, because it can be changed into a prime (57128471681) 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, 3131385 + ... + 3149575.

It is an arithmetic number, because the mean of its divisors is an integer number (1221206220).

Almost surely, 2^57128471680 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 57128471680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78157198080).

57128471680 is an abundant number, since it is smaller than the sum of its proper divisors (99185924480).

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

57128471680 is a wasteful number, since it uses less digits than its factorization.

57128471680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18918 (or 18906 counting only the distinct ones).

The product of its (nonzero) digits is 752640, while the sum is 49.

The spelling of 57128471680 in words is "fifty-seven billion, one hundred twenty-eight million, four hundred seventy-one thousand, six hundred eighty".