57821271508 has 144 divisors (see below), whose sum is σ = 137313711360. Its totient is φ = 20730378240.

The previous prime is 57821271503. The next prime is 57821271527. The reversal of 57821271508 is 80517212875.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57821271503) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15545673 + ... + 15549391.

It is an arithmetic number, because the mean of its divisors is an integer number (953567440).

Almost surely, 2^57821271508 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 57821271508, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68656855680).

57821271508 is an abundant number, since it is smaller than the sum of its proper divisors (79492439852).

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

57821271508 is a wasteful number, since it uses less digits than its factorization.

57821271508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4118 (or 4105 counting only the distinct ones).

The product of its (nonzero) digits is 313600, while the sum is 46.

The spelling of 57821271508 in words is "fifty-seven billion, eight hundred twenty-one million, two hundred seventy-one thousand, five hundred eight".