57821178240 has 1024 divisors, whose sum is σ = 244290816000. Its totient is φ = 12651724800.

The previous prime is 57821178227. The next prime is 57821178241. The reversal of 57821178240 is 4287112875.

57821178240 is a `hidden beast` number, since 578 + 2 + 1 + 1 + 78 + 2 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57821178241) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 441382975 + ... + 441383105.

It is an arithmetic number, because the mean of its divisors is an integer number (238565250).

Almost surely, 2^57821178240 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 57821178240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (122145408000).

57821178240 is an abundant number, since it is smaller than the sum of its proper divisors (186469637760).

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

57821178240 is a wasteful number, since it uses less digits than its factorization.

57821178240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296 (or 278 counting only the distinct ones).

The product of its (nonzero) digits is 250880, while the sum is 45.

The spelling of 57821178240 in words is "fifty-seven billion, eight hundred twenty-one million, one hundred seventy-eight thousand, two hundred forty".