57128447804520 has 128 divisors (see below), whose sum is σ = 175585284282240. Its totient is φ = 14861008527360.

The previous prime is 57128447804503. The next prime is 57128447804557. The reversal of 57128447804520 is 2540874482175.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43250512 + ... + 44551808.

It is an arithmetic number, because the mean of its divisors is an integer number (1371760033455).

Almost surely, 2^{57128447804520} 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 57128447804520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87792642141120).

57128447804520 is an abundant number, since it is smaller than the sum of its proper divisors (118456836477720).

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

57128447804520 is a wasteful number, since it uses less digits than its factorization.

57128447804520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1310275 (or 1310271 counting only the distinct ones).

The product of its (nonzero) digits is 20070400, while the sum is 57.

The spelling of 57128447804520 in words is "fifty-seven trillion, one hundred twenty-eight billion, four hundred forty-seven million, eight hundred four thousand, five hundred twenty".